This repository was archived by the owner on Nov 9, 2017. It is now read-only.
This repository was archived by the owner on Nov 9, 2017. It is now read-only.
V8 5.9 & Node.js 8.0 #146
Closed
Description
- We have perf regressions with 5.9 that seem fairly serious, at least when looked at in our microbenchmark suite, at least from the one run that was done early on
- 6.0 doesn't appear to have any difference from those benchmarks (so I'm hearing, have no confirmed any of this myself), this suggests to me that we're not going to get much upstream help in reigning in perf problems; so see next point:
- Our "CrankshaftScript" is going to need heavy-handed refactoring to make it "TurboFanScript", it's unlikely to be a clean process given how much untangling will need to be done—I'd expect us to hit a bunch of edge cases we don't have tests for, just because that's the nature of perf optimised crazy-code, and this will be ongoing too as the process of learning how to pander to TurboFan is going to be a long one (I think?)
- We are heading toward an LTS and the window is smaller than normal but we must stabilise early and not be scrambling to apply lipstick if we discover that it's looking like a pig
We have a really good record with our two LTS lines so far, I'm really concerned we're just rolling forward into a mini disaster for 8.0 LTS without weighing up the concerns.
@vsemozhetbyt and @targos so far appear to be the only ones who have investigated this, posted in nodejs/node#11851 which used a 5.9 candidate. Copied here for easier digestion:
arrays
improvement confidence p.value
arrays\\var-int.js n=25 type="Array" 2.12 % *** 1.911996e-11
arrays\\var-int.js n=25 type="Buffer" -1.39 % *** 2.953185e-13
arrays\\var-int.js n=25 type="Float32Array" 1.36 % *** 4.482114e-21
arrays\\var-int.js n=25 type="Float64Array" -1.29 % *** 3.712094e-13
arrays\\var-int.js n=25 type="Int16Array" -1.71 % *** 3.185373e-15
arrays\\var-int.js n=25 type="Int32Array" -0.84 % *** 3.184537e-04
arrays\\var-int.js n=25 type="Int8Array" -1.43 % *** 2.081429e-16
arrays\\var-int.js n=25 type="Uint16Array" -1.61 % *** 1.591048e-17
arrays\\var-int.js n=25 type="Uint32Array" -0.51 % * 4.560219e-02
arrays\\var-int.js n=25 type="Uint8Array" -1.42 % *** 3.315598e-35
arrays\\zero-float.js n=25 type="Array" -0.29 % * 2.067735e-02
arrays\\zero-float.js n=25 type="Buffer" 0.81 % *** 1.432181e-14
arrays\\zero-float.js n=25 type="Float32Array" 10.16 % *** 1.887618e-43
arrays\\zero-float.js n=25 type="Float64Array" 0.37 % ** 1.180476e-03
arrays\\zero-float.js n=25 type="Int16Array" -1.19 % *** 7.951452e-28
arrays\\zero-float.js n=25 type="Int32Array" -6.52 % *** 1.214743e-42
arrays\\zero-float.js n=25 type="Int8Array" -17.88 % *** 7.204014e-81
arrays\\zero-float.js n=25 type="Uint16Array" -1.16 % *** 2.603611e-21
arrays\\zero-float.js n=25 type="Uint32Array" -6.40 % *** 5.803861e-43
arrays\\zero-float.js n=25 type="Uint8Array" -17.86 % *** 7.705079e-84
arrays\\zero-int.js n=25 type="Array" -0.43 % * 3.411995e-02
arrays\\zero-int.js n=25 type="Buffer" 0.93 % *** 3.097691e-12
arrays\\zero-int.js n=25 type="Float32Array" 10.41 % *** 3.242834e-58
arrays\\zero-int.js n=25 type="Float64Array" 0.61 % ** 6.996484e-03
arrays\\zero-int.js n=25 type="Int16Array" -1.18 % *** 7.198962e-17
arrays\\zero-int.js n=25 type="Int32Array" -6.24 % *** 2.192567e-42
arrays\\zero-int.js n=25 type="Int8Array" -17.80 % *** 4.249127e-61
arrays\\zero-int.js n=25 type="Uint16Array" -1.04 % *** 1.051799e-17
arrays\\zero-int.js n=25 type="Uint32Array" -6.41 % *** 7.414706e-53
arrays\\zero-int.js n=25 type="Uint8Array" -17.98 % *** 6.231374e-72
arrays ("fixed" version by @targos)
improvement confidence p.value
arrays/var-int.js n=25 type="Array" -1.05 % 8.210770e-01
arrays/var-int.js n=25 type="Buffer" -1.54 % 7.566834e-02
arrays/var-int.js n=25 type="Float32Array" 4.37 % 2.336688e-01
arrays/var-int.js n=25 type="Float64Array" 4.08 % 3.362891e-01
arrays/var-int.js n=25 type="Int16Array" -0.05 % 9.828921e-01
arrays/var-int.js n=25 type="Int32Array" -0.33 % 9.339843e-01
arrays/var-int.js n=25 type="Int8Array" -1.18 % 2.395664e-01
arrays/var-int.js n=25 type="Uint16Array" -0.40 % 8.660353e-01
arrays/var-int.js n=25 type="Uint32Array" -0.03 % 9.929733e-01
arrays/var-int.js n=25 type="Uint8Array" -1.43 % 1.526402e-01
arrays/zero-float.js n=25 type="Array" -1.17 % 8.379417e-01
arrays/zero-float.js n=25 type="Buffer" 9.29 % *** 5.629907e-07
arrays/zero-float.js n=25 type="Float32Array" 18.19 % *** 9.789400e-05
arrays/zero-float.js n=25 type="Float64Array" -0.48 % 9.050489e-01
arrays/zero-float.js n=25 type="Int16Array" 9.51 % ** 2.217754e-03
arrays/zero-float.js n=25 type="Int32Array" 17.43 % ** 1.694204e-03
arrays/zero-float.js n=25 type="Int8Array" 10.55 % *** 4.225859e-08
arrays/zero-float.js n=25 type="Uint16Array" 15.36 % *** 5.441519e-06
arrays/zero-float.js n=25 type="Uint32Array" 12.27 % ** 5.170996e-03
arrays/zero-float.js n=25 type="Uint8Array" 10.37 % *** 4.785524e-09
arrays/zero-int.js n=25 type="Array" -0.25 % 9.488216e-01
arrays/zero-int.js n=25 type="Buffer" 9.42 % *** 3.878194e-09
arrays/zero-int.js n=25 type="Float32Array" 18.75 % *** 6.911246e-05
arrays/zero-int.js n=25 type="Float64Array" -0.60 % 8.775090e-01
arrays/zero-int.js n=25 type="Int16Array" 11.43 % *** 4.247462e-07
arrays/zero-int.js n=25 type="Int32Array" 10.80 % *** 1.130166e-05
arrays/zero-int.js n=25 type="Int8Array" 9.77 % *** 1.961177e-09
arrays/zero-int.js n=25 type="Uint16Array" 8.71 % *** 3.570013e-04
arrays/zero-int.js n=25 type="Uint32Array" 11.22 % * 1.067604e-02
arrays/zero-int.js n=25 type="Uint8Array" 11.26 % *** 1.952135e-13
assert
improvement confidence p.value
assert\\deepequal-buffer.js method="nonstrict" len=100 n=1000 6.08 % *** 2.240694e-16
assert\\deepequal-buffer.js method="strict" len=100 n=1000 6.36 % *** 1.715121e-08
assert\\deepequal-prims-and-objs-big-array.js method="nonstrict" len=100000 n=25 prim="array" 11.16 % *** 3.089537e-20
assert\\deepequal-prims-and-objs-big-array.js method="nonstrict" len=100000 n=25 prim="boolean" 11.65 % *** 6.319150e-35
assert\\deepequal-prims-and-objs-big-array.js method="nonstrict" len=100000 n=25 prim="new-array" 11.43 % *** 1.019362e-28
assert\\deepequal-prims-and-objs-big-array.js method="nonstrict" len=100000 n=25 prim="null" 11.81 % *** 6.516888e-28
assert\\deepequal-prims-and-objs-big-array.js method="nonstrict" len=100000 n=25 prim="number" 10.07 % *** 3.636875e-23
assert\\deepequal-prims-and-objs-big-array.js method="nonstrict" len=100000 n=25 prim="object" 11.48 % *** 2.818413e-35
assert\\deepequal-prims-and-objs-big-array.js method="nonstrict" len=100000 n=25 prim="string" 11.38 % *** 8.847026e-29
assert\\deepequal-prims-and-objs-big-array.js method="nonstrict" len=100000 n=25 prim="undefined" 11.83 % *** 2.848567e-29
assert\\deepequal-prims-and-objs-big-array.js method="strict" len=100000 n=25 prim="array" 11.18 % *** 1.020906e-28
assert\\deepequal-prims-and-objs-big-array.js method="strict" len=100000 n=25 prim="boolean" 10.51 % *** 5.346165e-17
assert\\deepequal-prims-and-objs-big-array.js method="strict" len=100000 n=25 prim="new-array" 11.35 % *** 6.250137e-27
assert\\deepequal-prims-and-objs-big-array.js method="strict" len=100000 n=25 prim="null" 10.45 % *** 2.073088e-24
assert\\deepequal-prims-and-objs-big-array.js method="strict" len=100000 n=25 prim="number" 10.37 % *** 1.018234e-15
assert\\deepequal-prims-and-objs-big-array.js method="strict" len=100000 n=25 prim="object" 10.44 % *** 3.487968e-24
assert\\deepequal-prims-and-objs-big-array.js method="strict" len=100000 n=25 prim="string" 11.79 % *** 1.710809e-38
assert\\deepequal-prims-and-objs-big-array.js method="strict" len=100000 n=25 prim="undefined" 10.91 % *** 3.133955e-27
assert\\deepequal-prims-and-objs-big-loop.js method="nonstrict" n=1000000 prim="array" 39.25 % *** 2.220953e-63
assert\\deepequal-prims-and-objs-big-loop.js method="nonstrict" n=1000000 prim="boolean" 39.48 % *** 3.117618e-82
assert\\deepequal-prims-and-objs-big-loop.js method="nonstrict" n=1000000 prim="new-array" 40.43 % *** 1.118514e-73
assert\\deepequal-prims-and-objs-big-loop.js method="nonstrict" n=1000000 prim="null" 39.43 % *** 6.743661e-77
assert\\deepequal-prims-and-objs-big-loop.js method="nonstrict" n=1000000 prim="number" 36.70 % *** 8.813610e-64
assert\\deepequal-prims-and-objs-big-loop.js method="nonstrict" n=1000000 prim="object" 40.04 % *** 2.289447e-64
assert\\deepequal-prims-and-objs-big-loop.js method="nonstrict" n=1000000 prim="string" 39.03 % *** 1.345610e-76
assert\\deepequal-prims-and-objs-big-loop.js method="nonstrict" n=1000000 prim="undefined" 39.12 % *** 2.970695e-76
assert\\deepequal-prims-and-objs-big-loop.js method="strict" n=1000000 prim="array" 36.64 % *** 3.348739e-60
assert\\deepequal-prims-and-objs-big-loop.js method="strict" n=1000000 prim="boolean" 33.43 % *** 1.410337e-65
assert\\deepequal-prims-and-objs-big-loop.js method="strict" n=1000000 prim="new-array" 35.21 % *** 6.250969e-64
assert\\deepequal-prims-and-objs-big-loop.js method="strict" n=1000000 prim="null" 33.86 % *** 1.815821e-64
assert\\deepequal-prims-and-objs-big-loop.js method="strict" n=1000000 prim="number" 32.49 % *** 2.435150e-57
assert\\deepequal-prims-and-objs-big-loop.js method="strict" n=1000000 prim="object" 36.99 % *** 3.538131e-46
assert\\deepequal-prims-and-objs-big-loop.js method="strict" n=1000000 prim="string" 33.83 % *** 2.264266e-56
assert\\deepequal-prims-and-objs-big-loop.js method="strict" n=1000000 prim="undefined" 34.27 % *** 2.675520e-61
assert\\deepequal-typedarrays.js len=1000000 method="nonstrict" n=1 type="Float32Array" -11.66 % *** 7.849993e-27
assert\\deepequal-typedarrays.js len=1000000 method="nonstrict" n=1 type="Float64Array" -11.36 % *** 3.903625e-29
assert\\deepequal-typedarrays.js len=1000000 method="nonstrict" n=1 type="Int16Array" 8.10 % *** 1.298645e-16
assert\\deepequal-typedarrays.js len=1000000 method="nonstrict" n=1 type="Int32Array" 6.88 % *** 4.351738e-15
assert\\deepequal-typedarrays.js len=1000000 method="nonstrict" n=1 type="Int8Array" 10.21 % *** 3.566406e-21
assert\\deepequal-typedarrays.js len=1000000 method="nonstrict" n=1 type="Uint16Array" 6.94 % *** 6.770045e-14
assert\\deepequal-typedarrays.js len=1000000 method="nonstrict" n=1 type="Uint32Array" 7.38 % *** 1.083080e-12
assert\\deepequal-typedarrays.js len=1000000 method="nonstrict" n=1 type="Uint8Array" 7.85 % *** 5.187461e-18
assert\\deepequal-typedarrays.js len=1000000 method="nonstrict" n=1 type="Uint8ClampedArray" 8.13 % *** 7.616631e-16
assert\\deepequal-typedarrays.js len=1000000 method="strict" n=1 type="Float32Array" -11.03 % *** 6.610454e-66
assert\\deepequal-typedarrays.js len=1000000 method="strict" n=1 type="Float64Array" -11.06 % *** 2.551550e-46
assert\\deepequal-typedarrays.js len=1000000 method="strict" n=1 type="Int16Array" 0.60 % 5.300335e-01
assert\\deepequal-typedarrays.js len=1000000 method="strict" n=1 type="Int32Array" 0.09 % 8.860152e-01
assert\\deepequal-typedarrays.js len=1000000 method="strict" n=1 type="Int8Array" 5.09 % *** 2.161384e-04
assert\\deepequal-typedarrays.js len=1000000 method="strict" n=1 type="Uint16Array" 3.97 % ** 2.187538e-03
assert\\deepequal-typedarrays.js len=1000000 method="strict" n=1 type="Uint32Array" 0.90 % 4.287213e-01
assert\\deepequal-typedarrays.js len=1000000 method="strict" n=1 type="Uint8Array" 1.67 % 9.340617e-02
assert\\deepequal-typedarrays.js len=1000000 method="strict" n=1 type="Uint8ClampedArray" 3.99 % *** 9.655741e-04
buffers
improvement confidence p.value
buffers\\buffer-base64-decode.js n=32 -0.03 % 6.813796e-01
buffers\\buffer-base64-encode.js n=32 len=67108864 0.10 % 7.395115e-02
buffers\\buffer-bytelength.js n=5000000 len=1 encoding="base64" 16.14 % *** 5.629742e-46
buffers\\buffer-bytelength.js n=5000000 len=1 encoding="utf8" -36.00 % *** 2.712131e-60
buffers\\buffer-bytelength.js n=5000000 len=16 encoding="base64" 17.67 % *** 8.234877e-53
buffers\\buffer-bytelength.js n=5000000 len=16 encoding="utf8" -9.00 % *** 6.554314e-47
buffers\\buffer-bytelength.js n=5000000 len=2 encoding="base64" 14.62 % *** 1.496880e-30
buffers\\buffer-bytelength.js n=5000000 len=2 encoding="utf8" -27.22 % *** 4.940651e-70
buffers\\buffer-bytelength.js n=5000000 len=256 encoding="base64" 15.63 % *** 5.408900e-35
buffers\\buffer-bytelength.js n=5000000 len=256 encoding="utf8" -1.68 % *** 1.306409e-05
buffers\\buffer-bytelength.js n=5000000 len=4 encoding="base64" 17.38 % *** 8.353420e-48
buffers\\buffer-bytelength.js n=5000000 len=4 encoding="utf8" -23.14 % *** 2.336540e-62
buffers\\buffer-bytelength.js n=5000000 len=64 encoding="base64" 17.70 % *** 9.030145e-49
buffers\\buffer-bytelength.js n=5000000 len=64 encoding="utf8" -3.25 % *** 2.280305e-12
buffers\\buffer-compare-instance-method.js millions=1 args=1 size=1024 -11.50 % *** 2.000140e-17
buffers\\buffer-compare-instance-method.js millions=1 args=1 size=16 -12.12 % *** 2.153111e-25
buffers\\buffer-compare-instance-method.js millions=1 args=1 size=16386 2.15 % 3.759710e-01
buffers\\buffer-compare-instance-method.js millions=1 args=1 size=4096 -11.47 % *** 1.230915e-05
buffers\\buffer-compare-instance-method.js millions=1 args=1 size=512 -10.09 % *** 3.727958e-19
buffers\\buffer-compare-instance-method.js millions=1 args=2 size=1024 -19.04 % *** 7.673003e-27
buffers\\buffer-compare-instance-method.js millions=1 args=2 size=16 -21.40 % *** 3.935922e-62
buffers\\buffer-compare-instance-method.js millions=1 args=2 size=16386 -2.74 % 1.174619e-01
buffers\\buffer-compare-instance-method.js millions=1 args=2 size=4096 -15.96 % *** 7.638449e-11
buffers\\buffer-compare-instance-method.js millions=1 args=2 size=512 -19.64 % *** 5.566149e-30
buffers\\buffer-compare-instance-method.js millions=1 args=3 size=1024 -16.32 % *** 9.753637e-24
buffers\\buffer-compare-instance-method.js millions=1 args=3 size=16 -19.00 % *** 2.905866e-60
buffers\\buffer-compare-instance-method.js millions=1 args=3 size=16386 -3.50 % *** 3.463127e-04
buffers\\buffer-compare-instance-method.js millions=1 args=3 size=4096 -15.93 % *** 6.136367e-12
buffers\\buffer-compare-instance-method.js millions=1 args=3 size=512 -17.67 % *** 2.211209e-33
buffers\\buffer-compare-instance-method.js millions=1 args=4 size=1024 -17.24 % *** 3.824330e-29
buffers\\buffer-compare-instance-method.js millions=1 args=4 size=16 -19.58 % *** 1.338838e-38
buffers\\buffer-compare-instance-method.js millions=1 args=4 size=16386 -3.50 % *** 2.668278e-06
buffers\\buffer-compare-instance-method.js millions=1 args=4 size=4096 -15.32 % *** 4.822259e-11
buffers\\buffer-compare-instance-method.js millions=1 args=4 size=512 -16.30 % *** 3.251165e-25
buffers\\buffer-compare-instance-method.js millions=1 args=5 size=1024 -0.20 % 8.718793e-01
buffers\\buffer-compare-instance-method.js millions=1 args=5 size=16 -0.35 % 3.508750e-01
buffers\\buffer-compare-instance-method.js millions=1 args=5 size=16386 3.04 % ** 1.167276e-03
buffers\\buffer-compare-instance-method.js millions=1 args=5 size=4096 -4.48 % * 3.204543e-02
buffers\\buffer-compare-instance-method.js millions=1 args=5 size=512 1.06 % 8.748816e-02
buffers\\buffer-compare-offset.js millions=1 size=1024 method="offset" -3.03 % *** 1.757880e-11
buffers\\buffer-compare-offset.js millions=1 size=1024 method="slice" 7.19 % *** 9.960328e-16
buffers\\buffer-compare-offset.js millions=1 size=16 method="offset" -3.49 % *** 1.237199e-11
buffers\\buffer-compare-offset.js millions=1 size=16 method="slice" 7.24 % *** 1.006812e-19
buffers\\buffer-compare-offset.js millions=1 size=16386 method="offset" -3.00 % *** 5.300663e-09
buffers\\buffer-compare-offset.js millions=1 size=16386 method="slice" 7.22 % *** 6.424469e-16
buffers\\buffer-compare-offset.js millions=1 size=4096 method="offset" -3.75 % *** 2.294207e-14
buffers\\buffer-compare-offset.js millions=1 size=4096 method="slice" 7.18 % *** 3.934175e-20
buffers\\buffer-compare-offset.js millions=1 size=512 method="offset" -3.34 % *** 2.742405e-11
buffers\\buffer-compare-offset.js millions=1 size=512 method="slice" 7.59 % *** 8.893416e-20
buffers\\buffer-compare.js millions=1 size=1024 -21.69 % *** 2.710130e-27
buffers\\buffer-compare.js millions=1 size=16 -27.15 % *** 4.754943e-54
buffers\\buffer-compare.js millions=1 size=16386 -5.12 % ** 1.333052e-03
buffers\\buffer-compare.js millions=1 size=4096 -16.47 % *** 2.029561e-11
buffers\\buffer-compare.js millions=1 size=512 -23.08 % *** 9.287436e-34
buffers\\buffer-concat.js n=1024 withTotalLength=0 pieceSize=1 pieces=1 -4.73 % *** 7.982186e-07
buffers\\buffer-concat.js n=1024 withTotalLength=0 pieceSize=1 pieces=16 -26.40 % *** 4.427981e-42
buffers\\buffer-concat.js n=1024 withTotalLength=0 pieceSize=1 pieces=4 -19.26 % *** 1.195433e-37
buffers\\buffer-concat.js n=1024 withTotalLength=0 pieceSize=16 pieces=1 -9.86 % *** 9.593113e-24
buffers\\buffer-concat.js n=1024 withTotalLength=0 pieceSize=16 pieces=16 -24.97 % *** 3.166334e-28
buffers\\buffer-concat.js n=1024 withTotalLength=0 pieceSize=16 pieces=4 -21.01 % *** 2.224996e-52
buffers\\buffer-concat.js n=1024 withTotalLength=0 pieceSize=256 pieces=1 -6.38 % *** 4.025680e-17
buffers\\buffer-concat.js n=1024 withTotalLength=0 pieceSize=256 pieces=16 -12.39 % *** 1.076091e-51
buffers\\buffer-concat.js n=1024 withTotalLength=0 pieceSize=256 pieces=4 -13.81 % *** 2.545945e-52
buffers\\buffer-concat.js n=1024 withTotalLength=1 pieceSize=1 pieces=1 -3.94 % *** 4.046170e-11
buffers\\buffer-concat.js n=1024 withTotalLength=1 pieceSize=1 pieces=16 -29.76 % *** 1.779827e-50
buffers\\buffer-concat.js n=1024 withTotalLength=1 pieceSize=1 pieces=4 -19.35 % *** 1.488346e-44
buffers\\buffer-concat.js n=1024 withTotalLength=1 pieceSize=16 pieces=1 -12.40 % *** 2.748948e-26
buffers\\buffer-concat.js n=1024 withTotalLength=1 pieceSize=16 pieces=16 -30.48 % *** 5.782960e-53
buffers\\buffer-concat.js n=1024 withTotalLength=1 pieceSize=16 pieces=4 -22.38 % *** 2.518032e-47
buffers\\buffer-concat.js n=1024 withTotalLength=1 pieceSize=256 pieces=1 -7.67 % *** 1.012370e-17
buffers\\buffer-concat.js n=1024 withTotalLength=1 pieceSize=256 pieces=16 -13.33 % *** 6.172313e-47
buffers\\buffer-concat.js n=1024 withTotalLength=1 pieceSize=256 pieces=4 -12.97 % *** 1.221396e-50
buffers\\buffer-creation.js n=1024 len=10 type="buffer()" -5.87 % *** 9.479277e-09
buffers\\buffer-creation.js n=1024 len=10 type="fast-alloc-fill" 17.73 % *** 7.279321e-26
buffers\\buffer-creation.js n=1024 len=10 type="fast-alloc" -7.55 % *** 2.297406e-13
buffers\\buffer-creation.js n=1024 len=10 type="fast-allocUnsafe" -10.28 % *** 7.217664e-17
buffers\\buffer-creation.js n=1024 len=10 type="slow-allocUnsafe" 14.11 % *** 3.181184e-20
buffers\\buffer-creation.js n=1024 len=10 type="slow" 13.62 % *** 1.207137e-22
buffers\\buffer-creation.js n=1024 len=1024 type="buffer()" -3.41 % ** 1.440904e-03
buffers\\buffer-creation.js n=1024 len=1024 type="fast-alloc-fill" 9.64 % *** 1.272331e-12
buffers\\buffer-creation.js n=1024 len=1024 type="fast-alloc" 2.22 % * 3.739922e-02
buffers\\buffer-creation.js n=1024 len=1024 type="fast-allocUnsafe" -1.65 % 8.510120e-02
buffers\\buffer-creation.js n=1024 len=1024 type="slow-allocUnsafe" 10.84 % *** 2.302591e-14
buffers\\buffer-creation.js n=1024 len=1024 type="slow" 11.07 % *** 5.350467e-17
buffers\\buffer-creation.js n=1024 len=2048 type="buffer()" -1.89 % 7.896093e-02
buffers\\buffer-creation.js n=1024 len=2048 type="fast-alloc-fill" 5.82 % *** 1.278769e-06
buffers\\buffer-creation.js n=1024 len=2048 type="fast-alloc" 0.56 % 6.263182e-01
buffers\\buffer-creation.js n=1024 len=2048 type="fast-allocUnsafe" -0.13 % 8.992751e-01
buffers\\buffer-creation.js n=1024 len=2048 type="slow-allocUnsafe" 7.31 % *** 4.140525e-09
buffers\\buffer-creation.js n=1024 len=2048 type="slow" 7.26 % *** 1.368239e-08
buffers\\buffer-creation.js n=1024 len=4096 type="buffer()" 6.40 % *** 1.419849e-07
buffers\\buffer-creation.js n=1024 len=4096 type="fast-alloc-fill" 3.58 % ** 4.131086e-03
buffers\\buffer-creation.js n=1024 len=4096 type="fast-alloc" 0.23 % 8.587182e-01
buffers\\buffer-creation.js n=1024 len=4096 type="fast-allocUnsafe" 5.57 % *** 1.204951e-04
buffers\\buffer-creation.js n=1024 len=4096 type="slow-allocUnsafe" 4.85 % *** 3.717312e-05
buffers\\buffer-creation.js n=1024 len=4096 type="slow" 5.49 % *** 2.288046e-06
buffers\\buffer-creation.js n=1024 len=8192 type="buffer()" 7.39 % *** 1.701336e-07
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buffers\\buffer-read.js millions=1 type="Int32BE" buffer="fast" noAssert="true" -47.40 % *** 1.243172e-43
buffers\\buffer-read.js millions=1 type="Int32BE" buffer="slow" noAssert="false" 0.81 % 2.872066e-01
buffers\\buffer-read.js millions=1 type="Int32BE" buffer="slow" noAssert="true" -47.13 % *** 9.286128e-28
buffers\\buffer-read.js millions=1 type="Int32LE" buffer="fast" noAssert="false" 2.62 % ** 6.505751e-03
buffers\\buffer-read.js millions=1 type="Int32LE" buffer="fast" noAssert="true" -42.77 % *** 9.960392e-42
buffers\\buffer-read.js millions=1 type="Int32LE" buffer="slow" noAssert="false" 2.59 % *** 3.431484e-05
buffers\\buffer-read.js millions=1 type="Int32LE" buffer="slow" noAssert="true" -42.23 % *** 2.721267e-36
buffers\\buffer-read.js millions=1 type="Int8" buffer="fast" noAssert="false" 14.11 % *** 1.021695e-36
buffers\\buffer-read.js millions=1 type="Int8" buffer="fast" noAssert="true" -26.83 % *** 1.598243e-41
buffers\\buffer-read.js millions=1 type="Int8" buffer="slow" noAssert="false" 13.58 % *** 4.622852e-34
buffers\\buffer-read.js millions=1 type="Int8" buffer="slow" noAssert="true" -26.74 % *** 3.749623e-44
buffers\\buffer-read.js millions=1 type="UInt16BE" buffer="fast" noAssert="false" 4.00 % *** 9.770175e-10
buffers\\buffer-read.js millions=1 type="UInt16BE" buffer="fast" noAssert="true" -43.99 % *** 2.389208e-53
buffers\\buffer-read.js millions=1 type="UInt16BE" buffer="slow" noAssert="false" 3.02 % *** 2.438014e-11
buffers\\buffer-read.js millions=1 type="UInt16BE" buffer="slow" noAssert="true" -43.48 % *** 1.778761e-52
buffers\\buffer-read.js millions=1 type="UInt16LE" buffer="fast" noAssert="false" 7.27 % *** 7.607707e-19
buffers\\buffer-read.js millions=1 type="UInt16LE" buffer="fast" noAssert="true" -37.75 % *** 1.282249e-42
buffers\\buffer-read.js millions=1 type="UInt16LE" buffer="slow" noAssert="false" 6.32 % *** 1.510428e-13
buffers\\buffer-read.js millions=1 type="UInt16LE" buffer="slow" noAssert="true" -39.37 % *** 1.188848e-49
buffers\\buffer-read.js millions=1 type="UInt32BE" buffer="fast" noAssert="false" -6.57 % *** 2.519559e-15
buffers\\buffer-read.js millions=1 type="UInt32BE" buffer="fast" noAssert="true" -50.93 % *** 1.031245e-44
buffers\\buffer-read.js millions=1 type="UInt32BE" buffer="slow" noAssert="false" -7.23 % *** 5.927445e-26
buffers\\buffer-read.js millions=1 type="UInt32BE" buffer="slow" noAssert="true" -51.02 % *** 4.138643e-51
buffers\\buffer-read.js millions=1 type="UInt32LE" buffer="fast" noAssert="false" -4.94 % *** 1.291956e-09
buffers\\buffer-read.js millions=1 type="UInt32LE" buffer="fast" noAssert="true" -49.31 % *** 2.610133e-49
buffers\\buffer-read.js millions=1 type="UInt32LE" buffer="slow" noAssert="false" -5.06 % *** 8.029210e-16
buffers\\buffer-read.js millions=1 type="UInt32LE" buffer="slow" noAssert="true" -48.99 % *** 3.672503e-40
buffers\\buffer-read.js millions=1 type="UInt8" buffer="fast" noAssert="false" -13.40 % *** 8.950667e-29
buffers\\buffer-read.js millions=1 type="UInt8" buffer="fast" noAssert="true" -54.61 % *** 4.233053e-39
buffers\\buffer-read.js millions=1 type="UInt8" buffer="slow" noAssert="false" -12.84 % *** 6.666907e-28
buffers\\buffer-read.js millions=1 type="UInt8" buffer="slow" noAssert="true" -54.34 % *** 2.847385e-36
buffers\\buffer-slice.js n=1024 type="fast" 18.66 % *** 4.017939e-23
buffers\\buffer-slice.js n=1024 type="slow" 18.22 % *** 5.380341e-28
buffers\\buffer-tojson.js len=0 n=10000 -29.94 % *** 2.279781e-35
buffers\\buffer-tojson.js len=10 n=10000 -50.51 % *** 4.138969e-30
buffers\\buffer-tojson.js len=256 n=10000 -6.61 % *** 1.909075e-12
buffers\\buffer-tojson.js len=4096 n=10000 0.61 % 3.305055e-01
buffers\\buffer-tostring.js n=10000000 len=0 arg="false" -45.06 % *** 1.052493e-64
buffers\\buffer-tostring.js n=10000000 len=0 arg="true" 141.33 % *** 2.570761e-49
buffers\\buffer-tostring.js n=10000000 len=1 arg="false" -29.80 % *** 1.295265e-36
buffers\\buffer-tostring.js n=10000000 len=1 arg="true" -23.91 % *** 5.613356e-50
buffers\\buffer-tostring.js n=10000000 len=1024 arg="false" -11.89 % *** 1.852139e-43
buffers\\buffer-tostring.js n=10000000 len=1024 arg="true" -7.67 % *** 1.280761e-22
buffers\\buffer-tostring.js n=10000000 len=64 arg="false" -32.36 % *** 3.080627e-63
buffers\\buffer-tostring.js n=10000000 len=64 arg="true" -23.21 % *** 1.418203e-37
buffers\\buffer-write.js millions=1 type="DoubleBE" buffer="fast" noAssert="false" -43.56 % *** 1.585645e-31
buffers\\buffer-write.js millions=1 type="DoubleBE" buffer="fast" noAssert="true" -44.91 % *** 3.569385e-44
buffers\\buffer-write.js millions=1 type="DoubleBE" buffer="slow" noAssert="false" -44.11 % *** 1.041960e-42
buffers\\buffer-write.js millions=1 type="DoubleBE" buffer="slow" noAssert="true" -43.94 % *** 1.257416e-34
buffers\\buffer-write.js millions=1 type="DoubleLE" buffer="fast" noAssert="false" -39.65 % *** 1.140142e-82
buffers\\buffer-write.js millions=1 type="DoubleLE" buffer="fast" noAssert="true" -42.72 % *** 1.151006e-80
buffers\\buffer-write.js millions=1 type="DoubleLE" buffer="slow" noAssert="false" -39.74 % *** 3.682974e-75
buffers\\buffer-write.js millions=1 type="DoubleLE" buffer="slow" noAssert="true" -42.39 % *** 1.113374e-74
buffers\\buffer-write.js millions=1 type="FloatBE" buffer="fast" noAssert="false" -41.31 % *** 8.648892e-40
buffers\\buffer-write.js millions=1 type="FloatBE" buffer="fast" noAssert="true" -41.94 % *** 1.885928e-37
buffers\\buffer-write.js millions=1 type="FloatBE" buffer="slow" noAssert="false" -40.38 % *** 6.572863e-39
buffers\\buffer-write.js millions=1 type="FloatBE" buffer="slow" noAssert="true" -44.10 % *** 7.293289e-41
buffers\\buffer-write.js millions=1 type="FloatLE" buffer="fast" noAssert="false" -40.11 % *** 1.285867e-38
buffers\\buffer-write.js millions=1 type="FloatLE" buffer="fast" noAssert="true" -41.97 % *** 3.338780e-27
buffers\\buffer-write.js millions=1 type="FloatLE" buffer="slow" noAssert="false" -40.85 % *** 1.234396e-37
buffers\\buffer-write.js millions=1 type="FloatLE" buffer="slow" noAssert="true" -42.77 % *** 8.299756e-37
buffers\\buffer-write.js millions=1 type="Int16BE" buffer="fast" noAssert="false" 12.51 % *** 1.082288e-32
buffers\\buffer-write.js millions=1 type="Int16BE" buffer="fast" noAssert="true" -38.73 % *** 3.306965e-39
buffers\\buffer-write.js millions=1 type="Int16BE" buffer="slow" noAssert="false" 12.64 % *** 5.858414e-26
buffers\\buffer-write.js millions=1 type="Int16BE" buffer="slow" noAssert="true" -38.80 % *** 2.644936e-46
buffers\\buffer-write.js millions=1 type="Int16LE" buffer="fast" noAssert="false" 13.20 % *** 3.046712e-36
buffers\\buffer-write.js millions=1 type="Int16LE" buffer="fast" noAssert="true" -42.88 % *** 2.418837e-43
buffers\\buffer-write.js millions=1 type="Int16LE" buffer="slow" noAssert="false" 13.35 % *** 5.381653e-33
buffers\\buffer-write.js millions=1 type="Int16LE" buffer="slow" noAssert="true" -43.64 % *** 2.124825e-56
buffers\\buffer-write.js millions=1 type="Int32BE" buffer="fast" noAssert="false" 0.68 % 1.443934e-01
buffers\\buffer-write.js millions=1 type="Int32BE" buffer="fast" noAssert="true" -39.90 % *** 7.142140e-40
buffers\\buffer-write.js millions=1 type="Int32BE" buffer="slow" noAssert="false" 1.64 % *** 2.493676e-06
buffers\\buffer-write.js millions=1 type="Int32BE" buffer="slow" noAssert="true" -40.22 % *** 5.057077e-47
buffers\\buffer-write.js millions=1 type="Int32LE" buffer="fast" noAssert="false" 2.51 % *** 4.209786e-08
buffers\\buffer-write.js millions=1 type="Int32LE" buffer="fast" noAssert="true" -44.77 % *** 7.731343e-32
buffers\\buffer-write.js millions=1 type="Int32LE" buffer="slow" noAssert="false" 1.90 % *** 6.013827e-09
buffers\\buffer-write.js millions=1 type="Int32LE" buffer="slow" noAssert="true" -44.69 % *** 1.473504e-38
buffers\\buffer-write.js millions=1 type="Int8" buffer="fast" noAssert="false" 8.96 % *** 1.390186e-25
buffers\\buffer-write.js millions=1 type="Int8" buffer="fast" noAssert="true" -43.46 % *** 6.151087e-60
buffers\\buffer-write.js millions=1 type="Int8" buffer="slow" noAssert="false" 8.77 % *** 3.912871e-31
buffers\\buffer-write.js millions=1 type="Int8" buffer="slow" noAssert="true" -42.49 % *** 4.625293e-20
buffers\\buffer-write.js millions=1 type="UInt16BE" buffer="fast" noAssert="false" 15.93 % *** 1.920343e-40
buffers\\buffer-write.js millions=1 type="UInt16BE" buffer="fast" noAssert="true" -37.95 % *** 2.985032e-28
buffers\\buffer-write.js millions=1 type="UInt16BE" buffer="slow" noAssert="false" 15.93 % *** 1.402500e-43
buffers\\buffer-write.js millions=1 type="UInt16BE" buffer="slow" noAssert="true" -38.79 % *** 1.025692e-57
buffers\\buffer-write.js millions=1 type="UInt16LE" buffer="fast" noAssert="false" 12.50 % *** 2.898478e-33
buffers\\buffer-write.js millions=1 type="UInt16LE" buffer="fast" noAssert="true" -43.70 % *** 2.854414e-55
buffers\\buffer-write.js millions=1 type="UInt16LE" buffer="slow" noAssert="false" 12.86 % *** 6.317302e-42
buffers\\buffer-write.js millions=1 type="UInt16LE" buffer="slow" noAssert="true" -43.15 % *** 4.572356e-42
buffers\\buffer-write.js millions=1 type="UInt32BE" buffer="fast" noAssert="false" 5.89 % *** 1.182524e-25
buffers\\buffer-write.js millions=1 type="UInt32BE" buffer="fast" noAssert="true" -40.05 % *** 1.608055e-52
buffers\\buffer-write.js millions=1 type="UInt32BE" buffer="slow" noAssert="false" 5.68 % *** 2.005348e-24
buffers\\buffer-write.js millions=1 type="UInt32BE" buffer="slow" noAssert="true" -40.09 % *** 2.130559e-44
buffers\\buffer-write.js millions=1 type="UInt32LE" buffer="fast" noAssert="false" 5.20 % *** 3.130693e-19
buffers\\buffer-write.js millions=1 type="UInt32LE" buffer="fast" noAssert="true" -40.95 % *** 4.726284e-60
buffers\\buffer-write.js millions=1 type="UInt32LE" buffer="slow" noAssert="false" 5.93 % *** 2.668763e-20
buffers\\buffer-write.js millions=1 type="UInt32LE" buffer="slow" noAssert="true" -40.30 % *** 1.091369e-32
buffers\\buffer-write.js millions=1 type="UInt8" buffer="fast" noAssert="false" 8.60 % *** 2.492144e-29
buffers\\buffer-write.js millions=1 type="UInt8" buffer="fast" noAssert="true" -41.73 % *** 1.405204e-31
buffers\\buffer-write.js millions=1 type="UInt8" buffer="slow" noAssert="false" 9.32 % *** 4.601417e-22
buffers\\buffer-write.js millions=1 type="UInt8" buffer="slow" noAssert="true" -42.55 % *** 2.019819e-31
buffers\\buffer_zero.js type="buffer" n=1024 2.44 % *** 3.511559e-04
buffers\\buffer_zero.js type="string" n=1024 8.90 % *** 1.325879e-13
buffers\\dataview-set.js millions=1 type="Float32BE" -4.65 % *** 1.682569e-11
buffers\\dataview-set.js millions=1 type="Float32LE" -6.15 % *** 1.081206e-21
buffers\\dataview-set.js millions=1 type="Float64BE" -6.72 % *** 5.129692e-21
buffers\\dataview-set.js millions=1 type="Float64LE" -7.83 % *** 4.473849e-17
buffers\\dataview-set.js millions=1 type="Int16BE" -4.64 % ** 1.451298e-03
buffers\\dataview-set.js millions=1 type="Int16LE" -3.09 % *** 4.174781e-04
buffers\\dataview-set.js millions=1 type="Int32BE" -3.69 % ** 1.222692e-03
buffers\\dataview-set.js millions=1 type="Int32LE" -5.41 % *** 6.345715e-07
buffers\\dataview-set.js millions=1 type="Int8" -6.33 % *** 1.863074e-07
buffers\\dataview-set.js millions=1 type="Uint16BE" -7.71 % *** 4.916663e-08
buffers\\dataview-set.js millions=1 type="Uint16LE" -9.33 % *** 2.014695e-15
buffers\\dataview-set.js millions=1 type="Uint32BE" 29.27 % *** 6.652924e-54
buffers\\dataview-set.js millions=1 type="Uint32LE" 33.39 % *** 8.781109e-55
buffers\\dataview-set.js millions=1 type="Uint8" -4.19 % *** 2.561106e-04
buffer-swap.js with --set n=1e6
improvement confidence p.value
buffers\\buffer-swap.js n=1000000 len=1024 method="swap16" aligned="false" 0.36 % *** 6.076393e-18
buffers\\buffer-swap.js n=1000000 len=1024 method="swap16" aligned="true" 1.10 % *** 1.359542e-22
buffers\\buffer-swap.js n=1000000 len=1024 method="swap32" aligned="false" 0.07 % 1.796922e-01
buffers\\buffer-swap.js n=1000000 len=1024 method="swap32" aligned="true" 0.22 % * 1.744881e-02
buffers\\buffer-swap.js n=1000000 len=1024 method="swap64" aligned="false" 0.24 % *** 1.566726e-07
buffers\\buffer-swap.js n=1000000 len=1024 method="swap64" aligned="true" -0.04 % 7.858086e-01
buffers\\buffer-swap.js n=1000000 len=128 method="swap16" aligned="false" 1.96 % *** 2.119761e-08
buffers\\buffer-swap.js n=1000000 len=128 method="swap16" aligned="true" 3.60 % *** 8.102858e-24
buffers\\buffer-swap.js n=1000000 len=128 method="swap32" aligned="false" -25.83 % *** 2.334289e-88
buffers\\buffer-swap.js n=1000000 len=128 method="swap32" aligned="true" -28.18 % *** 9.633524e-92
buffers\\buffer-swap.js n=1000000 len=128 method="swap64" aligned="false" -32.50 % *** 2.203248e-71
buffers\\buffer-swap.js n=1000000 len=128 method="swap64" aligned="true" -29.72 % *** 5.921971e-96
buffers\\buffer-swap.js n=1000000 len=1536 method="swap16" aligned="false" 0.21 % *** 2.326170e-04
buffers\\buffer-swap.js n=1000000 len=1536 method="swap16" aligned="true" 0.92 % *** 2.883013e-20
buffers\\buffer-swap.js n=1000000 len=1536 method="swap32" aligned="false" 0.10 % *** 8.005634e-06
buffers\\buffer-swap.js n=1000000 len=1536 method="swap32" aligned="true" 0.14 % 7.896609e-02
buffers\\buffer-swap.js n=1000000 len=1536 method="swap64" aligned="false" 0.09 % 9.037307e-02
buffers\\buffer-swap.js n=1000000 len=1536 method="swap64" aligned="true" 0.21 % 3.514098e-01
buffers\\buffer-swap.js n=1000000 len=2056 method="swap16" aligned="false" 0.17 % *** 3.248787e-04
buffers\\buffer-swap.js n=1000000 len=2056 method="swap16" aligned="true" 0.55 % *** 1.625691e-10
buffers\\buffer-swap.js n=1000000 len=2056 method="swap32" aligned="false" 0.02 % 1.648908e-01
buffers\\buffer-swap.js n=1000000 len=2056 method="swap32" aligned="true" 0.13 % * 3.592004e-02
buffers\\buffer-swap.js n=1000000 len=2056 method="swap64" aligned="false" -0.08 % 1.680445e-01
buffers\\buffer-swap.js n=1000000 len=2056 method="swap64" aligned="true" 0.13 % 8.412957e-02
buffers\\buffer-swap.js n=1000000 len=256 method="swap16" aligned="false" 1.14 % *** 2.298617e-15
buffers\\buffer-swap.js n=1000000 len=256 method="swap16" aligned="true" 2.35 % *** 8.848386e-23
buffers\\buffer-swap.js n=1000000 len=256 method="swap32" aligned="false" 0.51 % * 2.855728e-02
buffers\\buffer-swap.js n=1000000 len=256 method="swap32" aligned="true" 0.31 % * 4.837458e-02
buffers\\buffer-swap.js n=1000000 len=256 method="swap64" aligned="false" 0.70 % *** 1.187119e-10
buffers\\buffer-swap.js n=1000000 len=256 method="swap64" aligned="true" 0.03 % 8.377633e-01
buffers\\buffer-swap.js n=1000000 len=4096 method="swap16" aligned="false" 0.03 % 2.168347e-01
buffers\\buffer-swap.js n=1000000 len=4096 method="swap16" aligned="true" 0.27 % *** 5.990335e-08
buffers\\buffer-swap.js n=1000000 len=4096 method="swap32" aligned="false" 0.03 % 3.267018e-01
buffers\\buffer-swap.js n=1000000 len=4096 method="swap32" aligned="true" -0.05 % 7.015377e-01
buffers\\buffer-swap.js n=1000000 len=4096 method="swap64" aligned="false" -0.23 % 1.504769e-01
buffers\\buffer-swap.js n=1000000 len=4096 method="swap64" aligned="true" -0.18 % 7.870197e-02
buffers\\buffer-swap.js n=1000000 len=512 method="swap16" aligned="false" 0.57 % *** 4.245723e-15
buffers\\buffer-swap.js n=1000000 len=512 method="swap16" aligned="true" 1.80 % *** 3.992138e-20
buffers\\buffer-swap.js n=1000000 len=512 method="swap32" aligned="false" 0.35 % *** 6.259493e-09
buffers\\buffer-swap.js n=1000000 len=512 method="swap32" aligned="true" 0.42 % ** 1.212643e-03
buffers\\buffer-swap.js n=1000000 len=512 method="swap64" aligned="false" 0.52 % *** 2.336598e-16
buffers\\buffer-swap.js n=1000000 len=512 method="swap64" aligned="true" -0.04 % 7.897691e-01
buffers\\buffer-swap.js n=1000000 len=64 method="swap16" aligned="false" -11.63 % *** 1.715831e-70
buffers\\buffer-swap.js n=1000000 len=64 method="swap16" aligned="true" -11.28 % *** 2.934296e-46
buffers\\buffer-swap.js n=1000000 len=64 method="swap32" aligned="false" -22.73 % *** 6.453671e-79
buffers\\buffer-swap.js n=1000000 len=64 method="swap32" aligned="true" -23.37 % *** 3.179763e-71
buffers\\buffer-swap.js n=1000000 len=64 method="swap64" aligned="false" -26.91 % *** 1.133643e-31
buffers\\buffer-swap.js n=1000000 len=64 method="swap64" aligned="true" -24.71 % *** 1.203672e-29
buffers\\buffer-swap.js n=1000000 len=768 method="swap16" aligned="false" 0.38 % *** 5.071203e-12
buffers\\buffer-swap.js n=1000000 len=768 method="swap16" aligned="true" 1.18 % *** 2.312994e-23
buffers\\buffer-swap.js n=1000000 len=768 method="swap32" aligned="false" 0.17 % ** 2.755085e-03
buffers\\buffer-swap.js n=1000000 len=768 method="swap32" aligned="true" 0.13 % 3.430058e-01
buffers\\buffer-swap.js n=1000000 len=768 method="swap64" aligned="false" 0.44 % *** 4.743284e-04
buffers\\buffer-swap.js n=1000000 len=768 method="swap64" aligned="true" -0.03 % 8.388090e-01
buffers\\buffer-swap.js n=1000000 len=8 method="swap16" aligned="false" 6.06 % *** 2.951182e-30
buffers\\buffer-swap.js n=1000000 len=8 method="swap16" aligned="true" 5.74 % *** 3.316930e-21
buffers\\buffer-swap.js n=1000000 len=8 method="swap32" aligned="false" 3.50 % *** 1.244331e-22
buffers\\buffer-swap.js n=1000000 len=8 method="swap32" aligned="true" 1.72 % *** 1.879290e-11
buffers\\buffer-swap.js n=1000000 len=8 method="swap64" aligned="false" 0.68 % * 3.477764e-02
buffers\\buffer-swap.js n=1000000 len=8 method="swap64" aligned="true" 0.10 % 8.185927e-01
buffers\\buffer-swap.js n=1000000 len=8192 method="swap16" aligned="false" 0.02 % 1.425613e-01
buffers\\buffer-swap.js n=1000000 len=8192 method="swap16" aligned="true" 0.18 % *** 1.916646e-08
buffers\\buffer-swap.js n=1000000 len=8192 method="swap32" aligned="false" -0.02 % 2.420096e-01
buffers\\buffer-swap.js n=1000000 len=8192 method="swap32" aligned="true" 0.11 % * 2.388254e-02
buffers\\buffer-swap.js n=1000000 len=8192 method="swap64" aligned="false" -0.17 % ** 3.838764e-03
buffers\\buffer-swap.js n=1000000 len=8192 method="swap64" aligned="true" 0.02 % 6.347701e-01
child_process
improvement confidence p.value
child_process\\child-process-exec-stdout.js dur=5 len=1024 -0.90 % 4.373815e-01
child_process\\child-process-exec-stdout.js dur=5 len=256 0.23 % 8.935467e-01
child_process\\child-process-exec-stdout.js dur=5 len=4096 0.62 % 6.591330e-01
child_process\\child-process-exec-stdout.js dur=5 len=64 -1.87 % 3.482599e-01
child_process\\child-process-params.js params=1 methodName="exec" n=1000 -4.63 % *** 5.123714e-11
child_process\\child-process-params.js params=1 methodName="execFile" n=1000 -3.92 % *** 2.644723e-12
child_process\\child-process-params.js params=1 methodName="execFileSync" n=1000 -0.28 % 7.107140e-01
child_process\\child-process-params.js params=1 methodName="execSync" n=1000 -0.21 % 4.051633e-01
child_process\\child-process-params.js params=1 methodName="spawn" n=1000 -4.01 % *** 1.536730e-14
child_process\\child-process-params.js params=1 methodName="spawnSync" n=1000 -0.22 % 7.796821e-01
child_process\\child-process-params.js params=2 methodName="exec" n=1000 -4.42 % *** 5.623094e-16
child_process\\child-process-params.js params=2 methodName="execFile" n=1000 -3.40 % *** 1.986012e-09
child_process\\child-process-params.js params=2 methodName="execFileSync" n=1000 0.07 % 9.104965e-01
child_process\\child-process-params.js params=2 methodName="execSync" n=1000 -0.09 % 4.823520e-01
child_process\\child-process-params.js params=2 methodName="spawn" n=1000 -3.98 % *** 7.050357e-13
child_process\\child-process-params.js params=2 methodName="spawnSync" n=1000 1.04 % 2.596032e-01
child_process\\child-process-params.js params=3 methodName="exec" n=1000 -5.15 % *** 4.912272e-15
child_process\\child-process-params.js params=3 methodName="execFile" n=1000 -4.78 % *** 2.814372e-17
child_process\\child-process-params.js params=3 methodName="execFileSync" n=1000 0.06 % 9.181210e-01
child_process\\child-process-params.js params=3 methodName="spawn" n=1000 -3.86 % *** 1.507486e-10
child_process\\child-process-params.js params=3 methodName="spawnSync" n=1000 1.02 % 2.644717e-01
child_process\\child-process-params.js params=4 methodName="execFile" n=1000 -3.90 % *** 7.927832e-17
child_process\\child-process-read-ipc.js dur=5 len=1024 -0.02 % 9.396622e-01
child_process\\child-process-read-ipc.js dur=5 len=1048576 1.03 % * 3.282735e-02
child_process\\child-process-read-ipc.js dur=5 len=16384 -0.27 % *** 5.423084e-04
child_process\\child-process-read-ipc.js dur=5 len=16777216 0.26 % 2.500390e-01
child_process\\child-process-read-ipc.js dur=5 len=256 -0.70 % *** 7.789173e-04
child_process\\child-process-read-ipc.js dur=5 len=4096 -0.21 % 9.370554e-02
child_process\\child-process-read-ipc.js dur=5 len=64 -0.68 % ** 2.257675e-03
child_process\\child-process-read-ipc.js dur=5 len=65536 0.91 % *** 3.971267e-04
child_process\\child-process-read.js dur=5 len=1024 0.83 % ** 1.021766e-03
child_process\\child-process-read.js dur=5 len=256 -1.70 % 4.431098e-01
child_process\\child-process-read.js dur=5 len=4096 -0.54 % 5.921539e-01
child_process\\child-process-read.js dur=5 len=64 0.84 % *** 6.748565e-05
child_process\\spawn-echo.js thousands=1 -0.68 % 3.306275e-01
domain
improvement confidence p.value
domain\\domain-fn-args.js n=10 arguments=0 -5.22 % 0.13903860
domain\\domain-fn-args.js n=10 arguments=1 -2.80 % 0.12515340
domain\\domain-fn-args.js n=10 arguments=2 -4.77 % * 0.01492218
domain\\domain-fn-args.js n=10 arguments=3 -4.34 % ** 0.00841915
es
improvement confidence p.value
es\\defaultparams-bench.js millions=100 method="withdefaults" 186.76 % *** 2.057441e-50
es\\defaultparams-bench.js millions=100 method="withoutdefaults" 187.46 % *** 1.148147e-66
es\\destructuring-bench.js millions=100 method="destructure" 58.76 % *** 3.980102e-67
es\\destructuring-bench.js millions=100 method="swap" -73.19 % *** 2.054673e-67
es\\destructuring-object-bench.js millions=100 method="destructureObject" 45.92 % *** 3.253867e-84
es\\destructuring-object-bench.js millions=100 method="normal" -2.25 % *** 1.426450e-24
es\\map-bench.js millions=1 method="fakeMap" -0.54 % 8.154590e-02
es\\map-bench.js millions=1 method="map" -1.98 % *** 4.223953e-12
es\\map-bench.js millions=1 method="nullProtoObject" -9.73 % *** 2.357791e-35
es\\map-bench.js millions=1 method="object" -6.76 % *** 2.362004e-27
es\\restparams-bench.js millions=100 method="arguments" -9.20 % *** 7.682132e-16
es\\restparams-bench.js millions=100 method="copy" -23.35 % *** 7.057908e-56
es\\restparams-bench.js millions=100 method="rest" 303.00 % *** 8.692510e-87
es\\spread-bench.js millions=5 rest=0 context="context" count=10 method="apply" 6.25 % *** 2.747691e-37
es\\spread-bench.js millions=5 rest=0 context="context" count=10 method="call-spread" 4.22 % *** 1.238224e-33
es\\spread-bench.js millions=5 rest=0 context="context" count=10 method="spread" 5.66 % *** 1.230090e-19
es\\spread-bench.js millions=5 rest=0 context="context" count=20 method="apply" 4.22 % *** 9.667833e-21
es\\spread-bench.js millions=5 rest=0 context="context" count=20 method="call-spread" 3.61 % *** 2.641823e-15
es\\spread-bench.js millions=5 rest=0 context="context" count=20 method="spread" 3.95 % *** 1.124106e-25
es\\spread-bench.js millions=5 rest=0 context="context" count=5 method="apply" 7.54 % *** 2.061487e-11
es\\spread-bench.js millions=5 rest=0 context="context" count=5 method="call-spread" 7.91 % *** 2.713476e-19
es\\spread-bench.js millions=5 rest=0 context="context" count=5 method="spread" 8.16 % *** 2.198573e-14
es\\spread-bench.js millions=5 rest=0 context="null" count=10 method="apply" 5.37 % *** 6.674710e-23
es\\spread-bench.js millions=5 rest=0 context="null" count=10 method="call-spread" 4.07 % *** 5.798976e-38
es\\spread-bench.js millions=5 rest=0 context="null" count=10 method="spread" 6.06 % *** 2.881326e-22
es\\spread-bench.js millions=5 rest=0 context="null" count=20 method="apply" 4.40 % *** 9.221114e-39
es\\spread-bench.js millions=5 rest=0 context="null" count=20 method="call-spread" 3.29 % *** 1.949925e-19
es\\spread-bench.js millions=5 rest=0 context="null" count=20 method="spread" 4.23 % *** 6.953280e-25
es\\spread-bench.js millions=5 rest=0 context="null" count=5 method="apply" 8.92 % *** 5.443435e-15
es\\spread-bench.js millions=5 rest=0 context="null" count=5 method="call-spread" 6.58 % *** 1.196305e-14
es\\spread-bench.js millions=5 rest=0 context="null" count=5 method="spread" 7.35 % *** 1.602696e-12
es\\spread-bench.js millions=5 rest=1 context="context" count=10 method="apply" 40.98 % *** 1.500746e-56
es\\spread-bench.js millions=5 rest=1 context="context" count=10 method="call-spread" 27.83 % *** 2.708692e-84
es\\spread-bench.js millions=5 rest=1 context="context" count=10 method="spread" 36.68 % *** 9.473065e-70
es\\spread-bench.js millions=5 rest=1 context="context" count=20 method="apply" 31.29 % *** 9.726107e-80
es\\spread-bench.js millions=5 rest=1 context="context" count=20 method="call-spread" 19.57 % *** 2.758893e-73
es\\spread-bench.js millions=5 rest=1 context="context" count=20 method="spread" 26.39 % *** 8.597381e-55
es\\spread-bench.js millions=5 rest=1 context="context" count=5 method="apply" 53.11 % *** 4.678357e-80
es\\spread-bench.js millions=5 rest=1 context="context" count=5 method="call-spread" 38.85 % *** 5.448252e-79
es\\spread-bench.js millions=5 rest=1 context="context" count=5 method="spread" 48.35 % *** 1.633168e-59
es\\spread-bench.js millions=5 rest=1 context="null" count=10 method="apply" 40.47 % *** 2.991328e-42
es\\spread-bench.js millions=5 rest=1 context="null" count=10 method="call-spread" 27.92 % *** 1.178384e-67
es\\spread-bench.js millions=5 rest=1 context="null" count=10 method="spread" 38.78 % *** 2.025877e-51
es\\spread-bench.js millions=5 rest=1 context="null" count=20 method="apply" 31.04 % *** 1.404906e-83
es\\spread-bench.js millions=5 rest=1 context="null" count=20 method="call-spread" 19.52 % *** 2.329415e-75
es\\spread-bench.js millions=5 rest=1 context="null" count=20 method="spread" 27.37 % *** 1.218005e-65
es\\spread-bench.js millions=5 rest=1 context="null" count=5 method="apply" 51.95 % *** 2.989997e-47
es\\spread-bench.js millions=5 rest=1 context="null" count=5 method="call-spread" 38.73 % *** 9.373389e-50
es\\spread-bench.js millions=5 rest=1 context="null" count=5 method="spread" 51.66 % *** 3.193677e-48
new es/foreach-bench.js
improvement confidence p.value
es\\foreach-bench.js millions=5 count=10 method="for-in" 1.36 % *** 1.074313e-05
es\\foreach-bench.js millions=5 count=10 method="for-of" 0.70 % *** 4.396489e-04
es\\foreach-bench.js millions=5 count=10 method="for" 5.31 % *** 2.817524e-26
es\\foreach-bench.js millions=5 count=10 method="forEach" 6.71 % *** 6.956617e-23
es\\foreach-bench.js millions=5 count=100 method="for-in" -2.48 % *** 1.222102e-12
es\\foreach-bench.js millions=5 count=100 method="for-of" 1.85 % *** 1.263492e-11
es\\foreach-bench.js millions=5 count=100 method="for" 21.90 % *** 1.471960e-44
es\\foreach-bench.js millions=5 count=100 method="forEach" -5.37 % *** 6.729070e-24
es\\foreach-bench.js millions=5 count=20 method="for-in" -1.60 % *** 1.931362e-07
es\\foreach-bench.js millions=5 count=20 method="for-of" 1.13 % *** 1.624073e-06
es\\foreach-bench.js millions=5 count=20 method="for" 12.95 % *** 7.255962e-58
es\\foreach-bench.js millions=5 count=20 method="forEach" 0.84 % *** 6.306995e-04
es\\foreach-bench.js millions=5 count=5 method="for-in" 2.90 % *** 2.485570e-13
es\\foreach-bench.js millions=5 count=5 method="for-of" -0.14 % 5.990183e-01
es\\foreach-bench.js millions=5 count=5 method="for" -3.16 % *** 1.395389e-07
es\\foreach-bench.js millions=5 count=5 method="forEach" 17.81 % *** 5.034140e-57
events
improvement confidence p.value
events\\ee-add-remove.js n=250000 -45.96 % *** 9.772078e-70
events\\ee-emit-multi-args.js n=2000000 -37.43 % *** 1.653690e-47
events\\ee-emit.js n=2000000 -42.67 % *** 1.317334e-47
events\\ee-listener-count-on-prototype.js n=50000000 120.82 % *** 3.881793e-63
events\\ee-listeners-many.js n=5000000 22.51 % *** 7.230026e-65
events\\ee-listeners.js n=5000000 12.49 % *** 5.530568e-39
events\\ee-once.js n=20000000 -17.92 % *** 3.652062e-28
http
The most long http benchmarks was a little shortened: check_is_http_token.js was launched with set n=5e7 instead of 5e8 and simple.js was launched with --runs 15 instead of 30.
improvement confidence p.value
http\\bench-parser.js n=100000 fields=16 -4.37 % *** 3.569241e-28
http\\bench-parser.js n=100000 fields=32 -3.46 % * 1.656215e-02
http\\bench-parser.js n=100000 fields=4 -11.25 % *** 1.023311e-42
http\\bench-parser.js n=100000 fields=8 -7.27 % *** 7.002934e-31
http\\check_invalid_header_char.js n=500000000 key="\177" -88.89 % *** 1.087074e-76
http\\check_invalid_header_char.js n=500000000 key="" -78.56 % *** 1.307016e-82
http\\check_invalid_header_char.js n=500000000 key="\\t\\t\\t\\t\\t\\t\\t\\t\\t\\tFoo bar baz" -38.94 % *** 1.564267e-107
http\\check_invalid_header_char.js n=500000000 key="1" -82.84 % *** 2.208471e-91
http\\check_invalid_header_char.js n=500000000 key="20091" -80.15 % *** 3.797239e-116
http\\check_invalid_header_char.js n=500000000 key="close" -80.14 % *** 1.631525e-142
http\\check_invalid_header_char.js n=500000000 key="en-US" -80.17 % *** 3.793769e-80
http\\check_invalid_header_char.js n=500000000 key="foo\\nbar" -91.21 % *** 7.622870e-154
http\\check_invalid_header_char.js n=500000000 key="gzip" -86.58 % *** 7.193320e-79
http\\check_invalid_header_char.js n=500000000 key="Here is a value..." -27.15 % *** 6.119973e-45
http\\check_invalid_header_char.js n=500000000 key="keep-alive" -54.69 % *** 2.247444e-66
http\\check_invalid_header_char.js n=500000000 key="private" -66.71 % *** 2.391885e-86
http\\check_invalid_header_char.js n=500000000 key="SAMEORIGIN" -54.73 % *** 4.635725e-76
http\\check_invalid_header_char.js n=500000000 key="Sat, 07 May 2016 16:54:48 GMT" -33.52 % *** 1.358258e-82
http\\check_invalid_header_char.js n=500000000 key="text/html; charset=utf-8" -36.93 % *** 1.107974e-47
http\\check_invalid_header_char.js n=500000000 key="text/plain" -54.66 % *** 8.837458e-56
http\\check_invalid_header_char.js n=500000000 key="中文呢" -34.59 % *** 3.093828e-52
http\\check_is_http_token.js n=50000000 key="((((())))" -80.63 % *** 2.506936e-60
http\\check_is_http_token.js n=50000000 key=":" -80.65 % *** 1.934004e-87
http\\check_is_http_token.js n=50000000 key=":alternate-protocol" -84.86 % *** 1.537442e-60
http\\check_is_http_token.js n=50000000 key="@@" -80.56 % *** 3.816927e-52
http\\check_is_http_token.js n=50000000 key="Accept-Ranges" -50.52 % *** 1.374950e-83
http\\check_is_http_token.js n=50000000 key="alt-svc" -59.64 % *** 1.257471e-71
http\\check_is_http_token.js n=50000000 key="alternate-protocol" -45.46 % *** 5.911024e-63
http\\check_is_http_token.js n=50000000 key="alternate-protocol:" -41.62 % *** 2.682686e-53
http\\check_is_http_token.js n=50000000 key="Cache-Control" -50.74 % *** 1.960734e-90
http\\check_is_http_token.js n=50000000 key="Connection" -47.90 % *** 8.006204e-63
http\\check_is_http_token.js n=50000000 key="Content-Encoding" -47.17 % *** 5.423750e-83
http\\check_is_http_token.js n=50000000 key="content-length" -49.73 % *** 1.641712e-59
http\\check_is_http_token.js n=50000000 key="Content-Location" -47.06 % *** 6.244804e-71
http\\check_is_http_token.js n=50000000 key="content-type" -43.33 % *** 7.090822e-71
http\\check_is_http_token.js n=50000000 key="Content-Type" -43.09 % *** 2.151129e-81
http\\check_is_http_token.js n=50000000 key="date" -81.51 % *** 1.778910e-73
http\\check_is_http_token.js n=50000000 key="ETag" -81.50 % *** 1.212925e-76
http\\check_is_http_token.js n=50000000 key="Expires" -59.18 % *** 1.485951e-74
http\\check_is_http_token.js n=50000000 key="Keep-Alive" -48.43 % *** 1.040756e-46
http\\check_is_http_token.js n=50000000 key="Last-Modified" -51.02 % *** 3.781236e-60
http\\check_is_http_token.js n=50000000 key="location" -55.80 % *** 5.556102e-64
http\\check_is_http_token.js n=50000000 key="server" -66.11 % *** 1.714344e-66
http\\check_is_http_token.js n=50000000 key="Server" -66.24 % *** 1.778495e-73
http\\check_is_http_token.js n=50000000 key="status" -66.81 % *** 1.687298e-60
http\\check_is_http_token.js n=50000000 key="TCN" -79.83 % *** 1.301879e-98
http\\check_is_http_token.js n=50000000 key="Transfer-Encoding" -46.97 % *** 2.318722e-45
http\\check_is_http_token.js n=50000000 key="Vary" -81.36 % *** 4.002107e-62
http\\check_is_http_token.js n=50000000 key="version" -59.34 % *** 6.095173e-76
http\\check_is_http_token.js n=50000000 key="x-frame-options" -48.38 % *** 2.059074e-70
http\\check_is_http_token.js n=50000000 key="x-xss-protection" -47.35 % *** 5.648471e-81
http\\check_is_http_token.js n=50000000 key="中文呢" -19.31 % *** 2.692170e-52
http\\chunked.js c=100 size=1 num=1 benchmarker="autocannon" -3.55 % *** 1.177415e-18
http\\chunked.js c=100 size=1 num=16 benchmarker="autocannon" -3.60 % *** 1.004363e-11
http\\chunked.js c=100 size=1 num=4 benchmarker="autocannon" -3.92 % *** 1.605936e-16
http\\chunked.js c=100 size=1 num=8 benchmarker="autocannon" -2.09 % *** 2.829203e-06
http\\chunked.js c=100 size=256 num=1 benchmarker="autocannon" -3.04 % *** 1.866999e-10
http\\chunked.js c=100 size=256 num=16 benchmarker="autocannon" -3.21 % *** 1.381201e-09
http\\chunked.js c=100 size=256 num=4 benchmarker="autocannon" -3.28 % *** 2.463133e-12
http\\chunked.js c=100 size=256 num=8 benchmarker="autocannon" -1.72 % *** 1.776643e-05
http\\chunked.js c=100 size=64 num=1 benchmarker="autocannon" -3.03 % *** 4.151764e-12
http\\chunked.js c=100 size=64 num=16 benchmarker="autocannon" -2.08 % *** 4.864422e-06
http\\chunked.js c=100 size=64 num=4 benchmarker="autocannon" -2.22 % *** 3.388990e-08
http\\chunked.js c=100 size=64 num=8 benchmarker="autocannon" -2.72 % *** 2.561185e-07
http\\client-request-body.js method="end" bytes=1024 type="asc" dur=5 -7.01 % *** 4.134339e-31
http\\client-request-body.js method="end" bytes=1024 type="buf" dur=5 -7.91 % *** 3.154750e-34
http\\client-request-body.js method="end" bytes=1024 type="utf" dur=5 -6.49 % *** 1.395121e-24
http\\client-request-body.js method="end" bytes=256 type="asc" dur=5 -6.90 % *** 2.348893e-33
http\\client-request-body.js method="end" bytes=256 type="buf" dur=5 -7.20 % *** 8.542280e-32
http\\client-request-body.js method="end" bytes=256 type="utf" dur=5 -7.13 % *** 9.335939e-36
http\\client-request-body.js method="end" bytes=32 type="asc" dur=5 -7.08 % *** 7.227582e-30
http\\client-request-body.js method="end" bytes=32 type="buf" dur=5 -7.25 % *** 6.532999e-35
http\\client-request-body.js method="end" bytes=32 type="utf" dur=5 -7.53 % *** 5.631636e-34
http\\client-request-body.js method="write" bytes=1024 type="asc" dur=5 -6.92 % *** 1.649107e-31
http\\client-request-body.js method="write" bytes=1024 type="buf" dur=5 -7.92 % *** 1.222351e-34
http\\client-request-body.js method="write" bytes=1024 type="utf" dur=5 -7.25 % *** 2.691796e-33
http\\client-request-body.js method="write" bytes=256 type="asc" dur=5 -7.01 % *** 3.714085e-32
http\\client-request-body.js method="write" bytes=256 type="buf" dur=5 -8.07 % *** 9.361541e-33
http\\client-request-body.js method="write" bytes=256 type="utf" dur=5 -7.38 % *** 2.399511e-30
http\\client-request-body.js method="write" bytes=32 type="asc" dur=5 -7.06 % *** 2.493660e-27
http\\client-request-body.js method="write" bytes=32 type="buf" dur=5 -8.08 % *** 1.307705e-30
http\\client-request-body.js method="write" bytes=32 type="utf" dur=5 -7.48 % *** 3.392244e-28
http\\cluster.js c=50 length=1024 type="buffer" benchmarker="autocannon" -4.78 % *** 3.117193e-07
http\\cluster.js c=50 length=1024 type="bytes" benchmarker="autocannon" -6.35 % *** 1.130824e-12
http\\cluster.js c=50 length=102400 type="buffer" benchmarker="autocannon" -5.82 % *** 1.821486e-07
http\\cluster.js c=50 length=102400 type="bytes" benchmarker="autocannon" -11.54 % *** 3.221650e-29
http\\cluster.js c=50 length=4 type="buffer" benchmarker="autocannon" -4.55 % *** 2.637825e-07
http\\cluster.js c=50 length=4 type="bytes" benchmarker="autocannon" -6.25 % *** 3.777872e-12
http\\cluster.js c=500 length=1024 type="buffer" benchmarker="autocannon" -5.03 % *** 1.108270e-10
http\\cluster.js c=500 length=1024 type="bytes" benchmarker="autocannon" -6.29 % *** 1.814635e-13
http\\cluster.js c=500 length=102400 type="buffer" benchmarker="autocannon" -5.29 % *** 4.350849e-05
http\\cluster.js c=500 length=102400 type="bytes" benchmarker="autocannon" -8.68 % *** 1.560928e-10
http\\cluster.js c=500 length=4 type="buffer" benchmarker="autocannon" -5.13 % *** 2.788204e-14
http\\cluster.js c=500 length=4 type="bytes" benchmarker="autocannon" -5.64 % *** 8.692756e-14
http\\create-clientrequest.js n=1000000 pathlen=1 1.76 % ** 6.565825e-03
http\\create-clientrequest.js n=1000000 pathlen=128 6.56 % *** 6.132681e-15
http\\create-clientrequest.js n=1000000 pathlen=16 10.93 % *** 1.240467e-23
http\\create-clientrequest.js n=1000000 pathlen=32 8.79 % *** 5.796884e-14
http\\create-clientrequest.js n=1000000 pathlen=64 6.54 % *** 4.556245e-22
http\\create-clientrequest.js n=1000000 pathlen=8 10.73 % *** 3.209776e-21
http\\end-vs-write-end.js method="end" c=100 kb=1024 type="asc" benchmarker="autocannon" 0.75 % 5.069610e-01
http\\end-vs-write-end.js method="end" c=100 kb=1024 type="buf" benchmarker="autocannon" -2.02 % ** 9.983234e-03
http\\end-vs-write-end.js method="end" c=100 kb=1024 type="utf" benchmarker="autocannon" 1.09 % 3.372412e-01
http\\end-vs-write-end.js method="end" c=100 kb=128 type="asc" benchmarker="autocannon" -10.09 % *** 7.552131e-18
http\\end-vs-write-end.js method="end" c=100 kb=128 type="buf" benchmarker="autocannon" -1.92 % * 3.740466e-02
http\\end-vs-write-end.js method="end" c=100 kb=128 type="utf" benchmarker="autocannon" -8.95 % *** 1.480997e-16
http\\end-vs-write-end.js method="end" c=100 kb=256 type="asc" benchmarker="autocannon" -4.08 % *** 1.377526e-06
http\\end-vs-write-end.js method="end" c=100 kb=256 type="buf" benchmarker="autocannon" 0.12 % 9.113114e-01
http\\end-vs-write-end.js method="end" c=100 kb=256 type="utf" benchmarker="autocannon" -3.19 % *** 1.029744e-05
http\\end-vs-write-end.js method="end" c=100 kb=64 type="asc" benchmarker="autocannon" -16.43 % *** 3.308102e-21
http\\end-vs-write-end.js method="end" c=100 kb=64 type="buf" benchmarker="autocannon" -1.25 % 1.566492e-01
http\\end-vs-write-end.js method="end" c=100 kb=64 type="utf" benchmarker="autocannon" -8.49 % *** 1.176542e-10
http\\end-vs-write-end.js method="write" c=100 kb=1024 type="asc" benchmarker="autocannon" -0.12 % 9.341455e-01
http\\end-vs-write-end.js method="write" c=100 kb=1024 type="buf" benchmarker="autocannon" 0.16 % 7.890450e-01
http\\end-vs-write-end.js method="write" c=100 kb=1024 type="utf" benchmarker="autocannon" -0.52 % 5.004981e-01
http\\end-vs-write-end.js method="write" c=100 kb=128 type="asc" benchmarker="autocannon" -11.05 % *** 1.926600e-16
http\\end-vs-write-end.js method="write" c=100 kb=128 type="buf" benchmarker="autocannon" -6.46 % *** 3.579947e-08
http\\end-vs-write-end.js method="write" c=100 kb=128 type="utf" benchmarker="autocannon" -11.42 % *** 8.420314e-24
http\\end-vs-write-end.js method="write" c=100 kb=256 type="asc" benchmarker="autocannon" -6.61 % *** 1.701159e-08
http\\end-vs-write-end.js method="write" c=100 kb=256 type="buf" benchmarker="autocannon" -6.35 % *** 1.870454e-07
http\\end-vs-write-end.js method="write" c=100 kb=256 type="utf" benchmarker="autocannon" -5.31 % *** 2.040191e-11
http\\end-vs-write-end.js method="write" c=100 kb=64 type="asc" benchmarker="autocannon" -23.43 % *** 1.297754e-26
http\\end-vs-write-end.js method="write" c=100 kb=64 type="buf" benchmarker="autocannon" -6.51 % *** 4.032692e-11
http\\end-vs-write-end.js method="write" c=100 kb=64 type="utf" benchmarker="autocannon" -11.04 % *** 1.206863e-19
http\\http_server_for_chunky_client.js type="send" num=2000 len=1 -5.79 % *** 8.491075e-18
http\\http_server_for_chunky_client.js type="send" num=2000 len=128 -2.59 % *** 8.357146e-14
http\\http_server_for_chunky_client.js type="send" num=2000 len=16 -4.59 % *** 1.302737e-22
http\\http_server_for_chunky_client.js type="send" num=2000 len=32 -3.71 % *** 8.800441e-16
http\\http_server_for_chunky_client.js type="send" num=2000 len=4 -5.07 % *** 6.604031e-17
http\\http_server_for_chunky_client.js type="send" num=2000 len=64 -3.57 % *** 2.493372e-14
http\\http_server_for_chunky_client.js type="send" num=2000 len=8 -5.43 % *** 6.684029e-18
http\\http_server_for_chunky_client.js type="send" num=5 len=1 -10.95 % *** 7.295982e-17
http\\http_server_for_chunky_client.js type="send" num=5 len=128 -18.91 % *** 1.691256e-28
http\\http_server_for_chunky_client.js type="send" num=5 len=16 -17.17 % *** 7.613305e-20
http\\http_server_for_chunky_client.js type="send" num=5 len=32 -16.70 % *** 9.378219e-23
http\\http_server_for_chunky_client.js type="send" num=5 len=4 -20.17 % *** 2.267978e-33
http\\http_server_for_chunky_client.js type="send" num=5 len=64 -18.62 % *** 6.457991e-23
http\\http_server_for_chunky_client.js type="send" num=5 len=8 -19.49 % *** 2.003852e-18
http\\http_server_for_chunky_client.js type="send" num=50 len=1 -15.03 % *** 1.106210e-39
http\\http_server_for_chunky_client.js type="send" num=50 len=128 -12.93 % *** 1.578896e-43
http\\http_server_for_chunky_client.js type="send" num=50 len=16 -14.41 % *** 2.370400e-40
http\\http_server_for_chunky_client.js type="send" num=50 len=32 -13.41 % *** 1.407625e-40
http\\http_server_for_chunky_client.js type="send" num=50 len=4 -14.83 % *** 1.022015e-43
http\\http_server_for_chunky_client.js type="send" num=50 len=64 -13.13 % *** 3.283492e-46
http\\http_server_for_chunky_client.js type="send" num=50 len=8 -14.18 % *** 1.020625e-41
http\\http_server_for_chunky_client.js type="send" num=500 len=1 -5.87 % *** 1.111754e-06
http\\http_server_for_chunky_client.js type="send" num=500 len=128 -4.72 % *** 4.420159e-19
http\\http_server_for_chunky_client.js type="send" num=500 len=16 -5.36 % *** 2.092015e-22
http\\http_server_for_chunky_client.js type="send" num=500 len=32 -3.68 % *** 1.404249e-13
http\\http_server_for_chunky_client.js type="send" num=500 len=4 -6.57 % *** 1.223214e-16
http\\http_server_for_chunky_client.js type="send" num=500 len=64 -4.79 % *** 2.066460e-23
http\\http_server_for_chunky_client.js type="send" num=500 len=8 -4.79 % *** 1.513417e-07
http\\simple.js res="normal" c=50 chunks=0 length=1024 type="buffer" benchmarker="autocannon" -4.17 % *** 4.862845e-05
http\\simple.js res="normal" c=50 chunks=0 length=1024 type="bytes" benchmarker="autocannon" -8.43 % *** 5.454468e-07
http\\simple.js res="normal" c=50 chunks=0 length=102400 type="buffer" benchmarker="autocannon" -4.91 % ** 3.241289e-03
http\\simple.js res="normal" c=50 chunks=0 length=102400 type="bytes" benchmarker="autocannon" -25.24 % *** 7.674309e-16
http\\simple.js res="normal" c=50 chunks=0 length=4 type="buffer" benchmarker="autocannon" -4.59 % *** 8.669667e-05
http\\simple.js res="normal" c=50 chunks=0 length=4 type="bytes" benchmarker="autocannon" -6.32 % *** 1.054130e-05
http\\simple.js res="normal" c=50 chunks=1 length=1024 type="buffer" benchmarker="autocannon" -5.06 % *** 2.501442e-05
http\\simple.js res="normal" c=50 chunks=1 length=1024 type="bytes" benchmarker="autocannon" -5.65 % *** 6.339490e-05
http\\simple.js res="normal" c=50 chunks=1 length=102400 type="buffer" benchmarker="autocannon" -3.28 % * 2.691863e-02
http\\simple.js res="normal" c=50 chunks=1 length=102400 type="bytes" benchmarker="autocannon" -13.40 % *** 1.355733e-16
http\\simple.js res="normal" c=50 chunks=1 length=4 type="buffer" benchmarker="autocannon" -4.24 % *** 3.382373e-04
http\\simple.js res="normal" c=50 chunks=1 length=4 type="bytes" benchmarker="autocannon" -4.45 % *** 2.801222e-05
http\\simple.js res="normal" c=50 chunks=4 length=1024 type="buffer" benchmarker="autocannon" -4.72 % *** 3.078187e-05
http\\simple.js res="normal" c=50 chunks=4 length=1024 type="bytes" benchmarker="autocannon" -3.68 % ** 3.193511e-03
http\\simple.js res="normal" c=50 chunks=4 length=102400 type="buffer" benchmarker="autocannon" -4.79 % ** 7.796647e-03
http\\simple.js res="normal" c=50 chunks=4 length=102400 type="bytes" benchmarker="autocannon" -9.21 % *** 7.230804e-05
http\\simple.js res="normal" c=50 chunks=4 length=4 type="buffer" benchmarker="autocannon" -5.82 % *** 2.674268e-05
http\\simple.js res="normal" c=50 chunks=4 length=4 type="bytes" benchmarker="autocannon" -4.23 % *** 4.396474e-04
http\\simple.js res="normal" c=500 chunks=0 length=1024 type="buffer" benchmarker="autocannon" -6.52 % *** 1.124726e-07
http\\simple.js res="normal" c=500 chunks=0 length=1024 type="bytes" benchmarker="autocannon" -8.37 % *** 7.851841e-08
http\\simple.js res="normal" c=500 chunks=0 length=102400 type="buffer" benchmarker="autocannon" -3.67 % * 3.904036e-02
http\\simple.js res="normal" c=500 chunks=0 length=102400 type="bytes" benchmarker="autocannon" -28.70 % *** 1.658213e-18
http\\simple.js res="normal" c=500 chunks=0 length=4 type="buffer" benchmarker="autocannon" -5.55 % *** 1.105788e-06
http\\simple.js res="normal" c=500 chunks=0 length=4 type="bytes" benchmarker="autocannon" -3.46 % ** 3.664429e-03
http\\simple.js res="normal" c=500 chunks=1 length=1024 type="buffer" benchmarker="autocannon" -5.76 % *** 2.093527e-06
http\\simple.js res="normal" c=500 chunks=1 length=1024 type="bytes" benchmarker="autocannon" -4.83 % *** 5.687172e-04
http\\simple.js res="normal" c=500 chunks=1 length=102400 type="buffer" benchmarker="autocannon" -3.93 % * 1.443829e-02
http\\simple.js res="normal" c=500 chunks=1 length=102400 type="bytes" benchmarker="autocannon" -15.57 % *** 2.753559e-17
http\\simple.js res="normal" c=500 chunks=1 length=4 type="buffer" benchmarker="autocannon" -6.46 % *** 7.633596e-07
http\\simple.js res="normal" c=500 chunks=1 length=4 type="bytes" benchmarker="autocannon" -4.28 % *** 6.074356e-04
http\\simple.js res="normal" c=500 chunks=4 length=1024 type="buffer" benchmarker="autocannon" -4.10 % *** 3.614595e-04
http\\simple.js res="normal" c=500 chunks=4 length=1024 type="bytes" benchmarker="autocannon" -3.00 % ** 6.119423e-03
http\\simple.js res="normal" c=500 chunks=4 length=102400 type="buffer" benchmarker="autocannon" -5.17 % ** 7.153175e-03
http\\simple.js res="normal" c=500 chunks=4 length=102400 type="bytes" benchmarker="autocannon" -5.45 % * 1.902785e-02
http\\simple.js res="normal" c=500 chunks=4 length=4 type="buffer" benchmarker="autocannon" -6.04 % *** 1.989949e-08
http\\simple.js res="normal" c=500 chunks=4 length=4 type="bytes" benchmarker="autocannon" -2.89 % * 2.727371e-02
http\\simple.js res="setHeader" c=50 chunks=0 length=1024 type="buffer" benchmarker="autocannon" -5.84 % *** 3.927146e-09
http\\simple.js res="setHeader" c=50 chunks=0 length=1024 type="bytes" benchmarker="autocannon" -8.28 % *** 1.050204e-07
http\\simple.js res="setHeader" c=50 chunks=0 length=102400 type="buffer" benchmarker="autocannon" -4.73 % ** 3.158161e-03
http\\simple.js res="setHeader" c=50 chunks=0 length=102400 type="bytes" benchmarker="autocannon" -10.73 % *** 5.309183e-15
http\\simple.js res="setHeader" c=50 chunks=0 length=4 type="buffer" benchmarker="autocannon" -6.36 % *** 1.812964e-09
http\\simple.js res="setHeader" c=50 chunks=0 length=4 type="bytes" benchmarker="autocannon" -5.88 % *** 3.057814e-04
http\\simple.js res="setHeader" c=50 chunks=1 length=1024 type="buffer" benchmarker="autocannon" -5.58 % *** 1.925861e-08
http\\simple.js res="setHeader" c=50 chunks=1 length=1024 type="bytes" benchmarker="autocannon" -6.23 % *** 2.869951e-06
http\\simple.js res="setHeader" c=50 chunks=1 length=102400 type="buffer" benchmarker="autocannon" -5.82 % ** 1.198956e-03
http\\simple.js res="setHeader" c=50 chunks=1 length=102400 type="bytes" benchmarker="autocannon" -10.41 % *** 1.290550e-13
http\\simple.js res="setHeader" c=50 chunks=1 length=4 type="buffer" benchmarker="autocannon" -6.35 % *** 4.469679e-08
http\\simple.js res="setHeader" c=50 chunks=1 length=4 type="bytes" benchmarker="autocannon" -4.81 % *** 7.020090e-06
http\\simple.js res="setHeader" c=50 chunks=4 length=1024 type="buffer" benchmarker="autocannon" -5.62 % *** 4.475218e-06
http\\simple.js res="setHeader" c=50 chunks=4 length=1024 type="bytes" benchmarker="autocannon" -3.18 % ** 2.280484e-03
http\\simple.js res="setHeader" c=50 chunks=4 length=102400 type="buffer" benchmarker="autocannon" -5.60 % ** 2.814704e-03
http\\simple.js res="setHeader" c=50 chunks=4 length=102400 type="bytes" benchmarker="autocannon" -6.29 % ** 3.563679e-03
http\\simple.js res="setHeader" c=50 chunks=4 length=4 type="buffer" benchmarker="autocannon" -6.56 % *** 1.448702e-08
http\\simple.js res="setHeader" c=50 chunks=4 length=4 type="bytes" benchmarker="autocannon" -2.69 % * 1.272579e-02
http\\simple.js res="setHeader" c=500 chunks=0 length=1024 type="buffer" benchmarker="autocannon" -5.44 % *** 1.667645e-05
http\\simple.js res="setHeader" c=500 chunks=0 length=1024 type="bytes" benchmarker="autocannon" -8.81 % *** 9.475921e-08
http\\simple.js res="setHeader" c=500 chunks=0 length=102400 type="buffer" benchmarker="autocannon" -2.75 % 6.818363e-02
http\\simple.js res="setHeader" c=500 chunks=0 length=102400 type="bytes" benchmarker="autocannon" -10.21 % *** 2.970999e-13
http\\simple.js res="setHeader" c=500 chunks=0 length=4 type="buffer" benchmarker="autocannon" -4.93 % *** 4.878756e-04
http\\simple.js res="setHeader" c=500 chunks=0 length=4 type="bytes" benchmarker="autocannon" -8.33 % *** 4.536478e-09
http\\simple.js res="setHeader" c=500 chunks=1 length=1024 type="buffer" benchmarker="autocannon" -5.24 % *** 1.016925e-04
http\\simple.js res="setHeader" c=500 chunks=1 length=1024 type="bytes" benchmarker="autocannon" -6.63 % *** 9.762973e-05
http\\simple.js res="setHeader" c=500 chunks=1 length=102400 type="buffer" benchmarker="autocannon" -4.17 % * 2.297458e-02
http\\simple.js res="setHeader" c=500 chunks=1 length=102400 type="bytes" benchmarker="autocannon" -12.01 % *** 1.902364e-17
http\\simple.js res="setHeader" c=500 chunks=1 length=4 type="buffer" benchmarker="autocannon" -4.51 % *** 4.990340e-04
http\\simple.js res="setHeader" c=500 chunks=1 length=4 type="bytes" benchmarker="autocannon" -6.48 % *** 2.152770e-06
http\\simple.js res="setHeader" c=500 chunks=4 length=1024 type="buffer" benchmarker="autocannon" -5.43 % *** 5.798034e-06
http\\simple.js res="setHeader" c=500 chunks=4 length=1024 type="bytes" benchmarker="autocannon" -3.33 % * 2.798374e-02
http\\simple.js res="setHeader" c=500 chunks=4 length=102400 type="buffer" benchmarker="autocannon" -4.07 % * 3.823748e-02
http\\simple.js res="setHeader" c=500 chunks=4 length=102400 type="bytes" benchmarker="autocannon" -8.36 % *** 3.811375e-04
http\\simple.js res="setHeader" c=500 chunks=4 length=4 type="buffer" benchmarker="autocannon" -5.58 % *** 2.991319e-05
http\\simple.js res="setHeader" c=500 chunks=4 length=4 type="bytes" benchmarker="autocannon" -3.15 % * 3.128712e-02
http\\simple.js res="setHeaderWH" c=50 chunks=0 length=1024 type="buffer" benchmarker="autocannon" -4.23 % *** 1.635204e-04
http\\simple.js res="setHeaderWH" c=50 chunks=0 length=1024 type="bytes" benchmarker="autocannon" -9.60 % *** 1.959187e-07
http\\simple.js res="setHeaderWH" c=50 chunks=0 length=102400 type="buffer" benchmarker="autocannon" -3.42 % * 1.414317e-02
http\\simple.js res="setHeaderWH" c=50 chunks=0 length=102400 type="bytes" benchmarker="autocannon" -24.92 % *** 1.729289e-12
http\\simple.js res="setHeaderWH" c=50 chunks=0 length=4 type="buffer" benchmarker="autocannon" -3.85 % ** 2.921067e-03
http\\simple.js res="setHeaderWH" c=50 chunks=0 length=4 type="bytes" benchmarker="autocannon" -7.80 % *** 1.600889e-07
http\\simple.js res="setHeaderWH" c=50 chunks=1 length=1024 type="buffer" benchmarker="autocannon" -4.69 % *** 5.645600e-05
http\\simple.js res="setHeaderWH" c=50 chunks=1 length=1024 type="bytes" benchmarker="autocannon" -7.51 % *** 3.705732e-06
http\\simple.js res="setHeaderWH" c=50 chunks=1 length=102400 type="buffer" benchmarker="autocannon" -4.58 % *** 7.952977e-04
http\\simple.js res="setHeaderWH" c=50 chunks=1 length=102400 type="bytes" benchmarker="autocannon" -13.14 % *** 4.292583e-18
http\\simple.js res="setHeaderWH" c=50 chunks=1 length=4 type="buffer" benchmarker="autocannon" -4.65 % *** 4.776798e-05
http\\simple.js res="setHeaderWH" c=50 chunks=1 length=4 type="bytes" benchmarker="autocannon" -5.81 % *** 3.656902e-06
http\\simple.js res="setHeaderWH" c=50 chunks=4 length=1024 type="buffer" benchmarker="autocannon" -5.38 % *** 5.252614e-06
http\\simple.js res="setHeaderWH" c=50 chunks=4 length=1024 type="bytes" benchmarker="autocannon" -3.39 % ** 7.162036e-03
http\\simple.js res="setHeaderWH" c=50 chunks=4 length=102400 type="buffer" benchmarker="autocannon" -4.63 % ** 6.541741e-03
http\\simple.js res="setHeaderWH" c=50 chunks=4 length=102400 type="bytes" benchmarker="autocannon" -8.07 % *** 6.679127e-04
http\\simple.js res="setHeaderWH" c=50 chunks=4 length=4 type="buffer" benchmarker="autocannon" -5.88 % *** 1.664189e-06
http\\simple.js res="setHeaderWH" c=50 chunks=4 length=4 type="bytes" benchmarker="autocannon" -3.82 % *** 7.560696e-04
http\\simple.js res="setHeaderWH" c=500 chunks=0 length=1024 type="buffer" benchmarker="autocannon" -5.89 % *** 3.958380e-07
http\\simple.js res="setHeaderWH" c=500 chunks=0 length=1024 type="bytes" benchmarker="autocannon" -9.99 % *** 3.889125e-09
http\\simple.js res="setHeaderWH" c=500 chunks=0 length=102400 type="buffer" benchmarker="autocannon" -3.60 % * 4.319252e-02
http\\simple.js res="setHeaderWH" c=500 chunks=0 length=102400 type="bytes" benchmarker="autocannon" -28.63 % *** 2.439082e-18
http\\simple.js res="setHeaderWH" c=500 chunks=0 length=4 type="buffer" benchmarker="autocannon" -6.45 % *** 3.711696e-10
http\\simple.js res="setHeaderWH" c=500 chunks=0 length=4 type="bytes" benchmarker="autocannon" -7.29 % *** 2.646061e-08
http\\simple.js res="setHeaderWH" c=500 chunks=1 length=1024 type="buffer" benchmarker="autocannon" -6.22 % *** 9.347363e-06
http\\simple.js res="setHeaderWH" c=500 chunks=1 length=1024 type="bytes" benchmarker="autocannon" -6.44 % *** 1.845766e-05
http\\simple.js res="setHeaderWH" c=500 chunks=1 length=102400 type="buffer" benchmarker="autocannon" -5.09 % * 1.153079e-02
http\\simple.js res="setHeaderWH" c=500 chunks=1 length=102400 type="bytes" benchmarker="autocannon" -15.37 % *** 1.632493e-16
http\\simple.js res="setHeaderWH" c=500 chunks=1 length=4 type="buffer" benchmarker="autocannon" -5.77 % *** 9.809755e-07
http\\simple.js res="setHeaderWH" c=500 chunks=1 length=4 type="bytes" benchmarker="autocannon" -4.46 % *** 3.223076e-04
http\\simple.js res="setHeaderWH" c=500 chunks=4 length=1024 type="buffer" benchmarker="autocannon" -6.08 % *** 5.702144e-06
http\\simple.js res="setHeaderWH" c=500 chunks=4 length=1024 type="bytes" benchmarker="autocannon" -2.95 % * 1.536396e-02
http\\simple.js res="setHeaderWH" c=500 chunks=4 length=102400 type="buffer" benchmarker="autocannon" -4.31 % * 1.684718e-02
http\\simple.js res="setHeaderWH" c=500 chunks=4 length=102400 type="bytes" benchmarker="autocannon" -7.40 % ** 2.654488e-03
http\\simple.js res="setHeaderWH" c=500 chunks=4 length=4 type="buffer" benchmarker="autocannon" -6.73 % *** 7.854392e-09
http\\simple.js res="setHeaderWH" c=500 chunks=4 length=4 type="bytes" benchmarker="autocannon" -3.46 % ** 7.784934e-03
module
improvement confidence p.value
module\\module-loader.js useCache="false" fullPath="false" thousands=50 -4.24 % * 2.924986e-02
module\\module-loader.js useCache="false" fullPath="true" thousands=50 1.43 % 4.253951e-01
module\\module-loader.js useCache="true" fullPath="false" thousands=50 19.81 % *** 2.188674e-07
module\\module-loader.js useCache="true" fullPath="true" thousands=50 5.57 % 3.987202e-01
net
improvement confidence p.value
net\\net-c2s-cork.js dur=5 type="buf" len=1024 -1.82 % *** 1.459071e-04
net\\net-c2s-cork.js dur=5 type="buf" len=128 -2.08 % *** 2.868727e-05
net\\net-c2s-cork.js dur=5 type="buf" len=16 -1.22 % ** 7.662987e-03
net\\net-c2s-cork.js dur=5 type="buf" len=32 -1.72 % *** 8.782447e-04
net\\net-c2s-cork.js dur=5 type="buf" len=4 -1.03 % * 2.950394e-02
net\\net-c2s-cork.js dur=5 type="buf" len=512 -2.09 % *** 4.327445e-07
net\\net-c2s-cork.js dur=5 type="buf" len=64 -1.86 % *** 9.534242e-05
net\\net-c2s-cork.js dur=5 type="buf" len=8 1.23 % ** 3.051232e-03
net\\net-c2s.js dur=5 type="asc" len=102400 -1.57 % *** 1.533519e-04
net\\net-c2s.js dur=5 type="asc" len=16777216 -0.02 % 9.339418e-01
net\\net-c2s.js dur=5 type="buf" len=102400 -1.35 % *** 2.334037e-04
net\\net-c2s.js dur=5 type="buf" len=16777216 0.97 % *** 1.881552e-05
net\\net-c2s.js dur=5 type="utf" len=102400 -0.77 % ** 3.194185e-03
net\\net-c2s.js dur=5 type="utf" len=16777216 0.87 % *** 7.962570e-04
net\\net-pipe.js dur=5 type="asc" len=102400 21.46 % 5.914150e-02
net\\net-pipe.js dur=5 type="asc" len=16777216 -5.31 % 5.306393e-01
net\\net-pipe.js dur=5 type="buf" len=102400 15.24 % 1.506721e-01
net\\net-pipe.js dur=5 type="buf" len=16777216 17.44 % 1.068245e-01
net\\net-pipe.js dur=5 type="utf" len=102400 6.00 % 3.415080e-01
net\\net-pipe.js dur=5 type="utf" len=16777216 4.76 % 5.760742e-01
net\\net-s2c.js dur=5 type="asc" len=102400 -1.26 % *** 1.179792e-04
net\\net-s2c.js dur=5 type="asc" len=16777216 0.24 % 2.778647e-01
net\\net-s2c.js dur=5 type="buf" len=102400 -1.58 % *** 1.175153e-04
net\\net-s2c.js dur=5 type="buf" len=16777216 1.09 % ** 9.607544e-03
net\\net-s2c.js dur=5 type="utf" len=102400 -1.39 % *** 1.722645e-10
net\\net-s2c.js dur=5 type="utf" len=16777216 0.93 % 1.215938e-01
net\\tcp-raw-c2s.js dur=5 type="asc" len=102400 -0.51 % 2.520456e-01
net\\tcp-raw-c2s.js dur=5 type="asc" len=16777216 -0.68 % * 3.019990e-02
net\\tcp-raw-c2s.js dur=5 type="buf" len=102400 -0.53 % 5.924597e-02
net\\tcp-raw-c2s.js dur=5 type="buf" len=16777216 0.65 % ** 1.305128e-03
net\\tcp-raw-c2s.js dur=5 type="utf" len=102400 -0.53 % 9.120898e-02
net\\tcp-raw-c2s.js dur=5 type="utf" len=16777216 0.63 % 1.074695e-01
net\\tcp-raw-s2c.js dur=5 type="asc" len=102400 -0.71 % * 4.672277e-02
net\\tcp-raw-s2c.js dur=5 type="asc" len=16777216 -0.21 % 6.686713e-01
net\\tcp-raw-s2c.js dur=5 type="buf" len=102400 -0.67 % 5.853961e-02
net\\tcp-raw-s2c.js dur=5 type="buf" len=16777216 0.61 % *** 4.102306e-04
net\\tcp-raw-s2c.js dur=5 type="utf" len=102400 -0.21 % 6.136643e-01
net\\tcp-raw-s2c.js dur=5 type="utf" len=16777216 -0.16 % 7.074423e-01
os
improvement confidence p.value
os\\cpus.js n=30000 -5.34 % *** 1.939582e-21
os\\loadavg.js n=5000000 13.34 % *** 8.419388e-36
process
improvement confidence p.value
process\\bench-env.js n=100000 0.28 % 1.493386e-01
process\\bench-hrtime.js type="diff" n=1000000 -0.31 % *** 9.291465e-06
process\\bench-hrtime.js type="raw" n=1000000 -0.37 % *** 4.781790e-16
process\\memoryUsage.js n=100000 -5.51 % *** 1.062248e-13
process\\next-tick-breadth-args.js millions=2 -20.70 % *** 5.710155e-60
process\\next-tick-breadth.js millions=2 11.20 % *** 2.730821e-47
process\\next-tick-depth-args.js millions=2 -30.70 % *** 2.342960e-62
process\\next-tick-depth.js millions=2 -28.69 % *** 6.210576e-43
querystring
improvement confidence p.value
querystring\\querystring-parse.js n=1000000 type="altspaces" -10.92 % *** 1.364564e-13
querystring\\querystring-parse.js n=1000000 type="encodefake" -10.04 % *** 4.934766e-25
querystring\\querystring-parse.js n=1000000 type="encodelast" -10.78 % *** 6.040949e-27
querystring\\querystring-parse.js n=1000000 type="encodemany" -3.88 % *** 2.484171e-12
querystring\\querystring-parse.js n=1000000 type="manyblankpairs" 17.03 % *** 3.669811e-30
querystring\\querystring-parse.js n=1000000 type="manypairs" 71.94 % *** 2.961889e-50
querystring\\querystring-parse.js n=1000000 type="multicharsep" -15.18 % *** 4.718177e-32
querystring\\querystring-parse.js n=1000000 type="multivalue" -2.28 % *** 3.041186e-07
querystring\\querystring-parse.js n=1000000 type="multivaluemany" -14.39 % *** 4.898868e-31
querystring\\querystring-parse.js n=1000000 type="noencode" -11.90 % *** 1.981318e-26
querystring\\querystring-stringify.js n=10000000 type="encodelast" -16.25 % *** 2.404157e-31
querystring\\querystring-stringify.js n=10000000 type="encodemany" -18.63 % *** 3.232300e-64
querystring\\querystring-stringify.js n=10000000 type="noencode" -5.14 % *** 6.372979e-24
querystring\\querystring-unescapebuffer.js n=10000000 input="%20%21%22%23%24%25%26%27%28%29%2A%2B%2C%2D%2E%2F%30%31%32%33%34%35%36%37" -6.47 % *** 1.572508e-22
querystring\\querystring-unescapebuffer.js n=10000000 input="there is nothing to unescape here" 3.07 % *** 2.934277e-06
querystring\\querystring-unescapebuffer.js n=10000000 input="there%20are%20several%20spaces%20that%20need%20to%20be%20unescaped" -10.03 % *** 3.310386e-19
querystring\\querystring-unescapebuffer.js n=10000000 input="there%2Qare%0-fake%escaped values in%%%%this%9Hstring" -5.56 % *** 6.509139e-16
streams
improvement confidence p.value
streams/readable-bigread.js n=1000 -10.73 % *** 1.269154e-12
streams/readable-bigunevenread.js n=1000 -13.88 % *** 1.834009e-19
streams/readable-boundaryread.js n=2000 -13.83 % *** 4.606770e-10
streams/readable-readall.js n=5000 -9.64 % *** 3.697793e-25
streams/readable-unevenread.js n=1000 -8.92 % *** 8.211917e-14
streams/writable-manywrites.js n=2000000 -22.36 % *** 9.987796e-27
streams (windows)
improvement confidence p.value
streams\\readable-bigread.js n=1000 -17.60 % *** 2.188145e-39
streams\\readable-bigunevenread.js n=1000 -14.71 % *** 8.952692e-34
streams\\readable-boundaryread.js n=2000 -13.13 % *** 8.564883e-31
streams\\readable-readall.js n=5000 -14.74 % *** 2.377291e-42
streams\\readable-unevenread.js n=1000 -13.26 % *** 5.473820e-19
streams\\writable-manywrites.js n=2000000 -15.44 % *** 2.245030e-33
string_decoder
(string-decoder.js was launched with n=25e4 instead of 25e5)
improvement confidence p.value
string_decoder\\string-decoder-create.js n=25000000 encoding="ascii" -5.57 % *** 2.938499e-28
string_decoder\\string-decoder-create.js n=25000000 encoding="AscII" -11.21 % *** 2.233764e-31
string_decoder\\string-decoder-create.js n=25000000 encoding="base64" 18.13 % *** 2.788810e-43
string_decoder\\string-decoder-create.js n=25000000 encoding="ucs2" 21.31 % *** 3.090671e-35
string_decoder\\string-decoder-create.js n=25000000 encoding="UTF-16LE" 12.17 % *** 1.610229e-15
string_decoder\\string-decoder-create.js n=25000000 encoding="utf-8" 26.49 % *** 5.179343e-44
string_decoder\\string-decoder-create.js n=25000000 encoding="UTF-8" 17.64 % *** 1.119155e-32
string_decoder\\string-decoder-create.js n=25000000 encoding="utf8" 33.97 % *** 2.164914e-43
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=1024 encoding="ascii" -10.28 % *** 4.118098e-43
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=1024 encoding="base64-ascii" -10.85 % *** 2.352498e-64
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=1024 encoding="base64-utf8" -10.11 % *** 2.515007e-49
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=1024 encoding="utf16le" -4.03 % *** 2.609310e-37
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=1024 encoding="utf8" -5.25 % *** 3.511981e-63
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=128 encoding="ascii" -19.03 % *** 6.691114e-43
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=128 encoding="base64-ascii" -18.85 % *** 8.161656e-24
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=128 encoding="base64-utf8" -18.74 % *** 8.300350e-27
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=128 encoding="utf16le" -15.45 % *** 1.551373e-57
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=128 encoding="utf8" -13.16 % *** 6.316570e-62
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=32 encoding="ascii" -20.26 % *** 3.785883e-47
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=32 encoding="base64-ascii" -21.82 % *** 1.009891e-21
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=32 encoding="base64-utf8" -21.91 % *** 3.389575e-20
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=32 encoding="utf16le" -15.73 % *** 3.185635e-44
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=32 encoding="utf8" -27.20 % *** 5.069660e-61
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=4096 encoding="ascii" -7.34 % *** 1.208310e-39
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=4096 encoding="base64-ascii" -7.49 % *** 2.706785e-40
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=4096 encoding="base64-utf8" -7.27 % *** 2.205726e-33
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=4096 encoding="utf16le" -3.41 % *** 1.607691e-15
string_decoder\\string-decoder.js n=250000 chunk=1024 inlen=4096 encoding="utf8" -4.79 % *** 3.066881e-69
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=1024 encoding="ascii" -21.32 % *** 3.470832e-57
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=1024 encoding="base64-ascii" -21.74 % *** 7.859288e-35
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=1024 encoding="base64-utf8" -22.21 % *** 1.199006e-35
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=1024 encoding="utf16le" -12.17 % *** 3.176889e-22
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=1024 encoding="utf8" -16.20 % *** 6.902098e-31
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=128 encoding="ascii" -21.20 % *** 1.196128e-43
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=128 encoding="base64-ascii" -22.98 % *** 7.835172e-36
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=128 encoding="base64-utf8" -21.89 % *** 3.082109e-32
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=128 encoding="utf16le" -13.96 % *** 1.030760e-20
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=128 encoding="utf8" -26.04 % *** 6.023027e-37
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=32 encoding="ascii" -22.78 % *** 4.964699e-53
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=32 encoding="base64-ascii" -24.04 % *** 2.392287e-36
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=32 encoding="base64-utf8" -23.38 % *** 1.614575e-31
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=32 encoding="utf16le" -17.59 % *** 6.662991e-47
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=32 encoding="utf8" -30.77 % *** 1.348067e-69
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=4096 encoding="ascii" -18.28 % *** 2.205989e-24
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=4096 encoding="base64-ascii" -20.96 % *** 7.900781e-24
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=4096 encoding="base64-utf8" -22.17 % *** 9.200040e-52
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=4096 encoding="utf16le" -13.88 % *** 2.685590e-44
string_decoder\\string-decoder.js n=250000 chunk=16 inlen=4096 encoding="utf8" -17.09 % *** 1.771876e-49
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=1024 encoding="ascii" -12.46 % *** 8.386790e-34
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=1024 encoding="base64-ascii" -14.75 % *** 6.154259e-29
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=1024 encoding="base64-utf8" -11.85 % *** 3.647512e-30
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=1024 encoding="utf16le" -7.36 % *** 1.969025e-25
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=1024 encoding="utf8" -4.14 % *** 8.657672e-36
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=128 encoding="ascii" -18.56 % *** 2.216563e-38
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=128 encoding="base64-ascii" -17.95 % *** 1.226298e-20
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=128 encoding="base64-utf8" -18.22 % *** 1.556503e-22
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=128 encoding="utf16le" -15.75 % *** 1.177897e-53
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=128 encoding="utf8" -12.93 % *** 4.922752e-61
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=32 encoding="ascii" -20.00 % *** 2.622663e-47
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=32 encoding="base64-ascii" -22.46 % *** 2.631449e-22
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=32 encoding="base64-utf8" -23.06 % *** 2.441661e-22
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=32 encoding="utf16le" -16.00 % *** 1.075582e-49
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=32 encoding="utf8" -27.23 % *** 1.741069e-66
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=4096 encoding="ascii" -12.18 % *** 2.709551e-37
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=4096 encoding="base64-ascii" -9.53 % *** 5.832544e-21
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=4096 encoding="base64-utf8" -8.51 % *** 5.870005e-27
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=4096 encoding="utf16le" -7.64 % *** 2.962503e-33
string_decoder\\string-decoder.js n=250000 chunk=256 inlen=4096 encoding="utf8" -3.02 % *** 7.767665e-47
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=1024 encoding="ascii" -15.56 % *** 4.858562e-43
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=1024 encoding="base64-ascii" -16.94 % *** 5.797840e-19
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=1024 encoding="base64-utf8" -12.47 % *** 1.226234e-20
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=1024 encoding="utf16le" -9.30 % *** 3.702454e-20
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=1024 encoding="utf8" -10.59 % *** 8.160000e-54
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=128 encoding="ascii" -19.21 % *** 7.353231e-50
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=128 encoding="base64-ascii" -16.99 % *** 8.922750e-18
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=128 encoding="base64-utf8" -14.68 % *** 1.513500e-22
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=128 encoding="utf16le" -16.00 % *** 3.151190e-46
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=128 encoding="utf8" -16.36 % *** 2.746556e-59
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=32 encoding="ascii" -20.88 % *** 2.914962e-33
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=32 encoding="base64-ascii" -23.01 % *** 8.390443e-24
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=32 encoding="base64-utf8" -22.59 % *** 2.732638e-20
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=32 encoding="utf16le" -15.60 % *** 5.365177e-39
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=32 encoding="utf8" -26.52 % *** 8.555508e-38
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=4096 encoding="ascii" -19.69 % *** 1.330018e-38
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=4096 encoding="base64-ascii" -11.96 % *** 6.249688e-17
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=4096 encoding="base64-utf8" -8.68 % *** 5.494369e-11
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=4096 encoding="utf16le" -12.10 % *** 7.708981e-45
string_decoder\\string-decoder.js n=250000 chunk=64 inlen=4096 encoding="utf8" -3.56 % *** 1.850288e-45
timers
improvement confidence p.value
timers/immediate.js type="breadth" thousands=2000 12.76 % *** 8.348231e-05
timers/immediate.js type="breadth1" thousands=2000 6.83 % *** 3.396593e-04
timers/immediate.js type="breadth4" thousands=2000 1.13 % 6.231323e-01
timers/immediate.js type="clear" thousands=2000 6.40 % *** 1.983798e-04
timers/immediate.js type="depth" thousands=2000 5.43 % *** 3.101314e-05
timers/immediate.js type="depth1" thousands=2000 9.83 % *** 5.083261e-11
timers/set-immediate-breadth-args.js millions=5 -0.12 % 7.798393e-01
timers/set-immediate-breadth.js millions=10 3.89 % *** 7.465471e-15
timers/set-immediate-depth-args.js millions=10 16.38 % *** 1.535860e-20
timers/set-immediate-depth.js millions=10 6.00 % *** 8.826471e-14
timers/timers-breadth.js thousands=500 8.19 % *** 8.195604e-18
timers/timers-cancel-pooled.js thousands=500 0.39 % 6.270987e-01
timers/timers-cancel-unpooled.js thousands=100 -0.17 % *** 9.034505e-04
timers/timers-depth.js thousands=1 -0.25 % 7.790906e-01
timers/timers-insert-pooled.js thousands=500 -11.42 % *** 5.366038e-36
timers/timers-insert-unpooled.js thousands=100 -5.00 % *** 4.390698e-11
timers/timers-timeout-pooled.js thousands=500 90.99 % *** 1.828523e-24
timers (windows)
improvement confidence p.value
timers\\immediate.js type="breadth" thousands=2000 13.61 % *** 9.040825e-20
timers\\immediate.js type="breadth1" thousands=2000 11.29 % *** 3.955783e-19
timers\\immediate.js type="breadth4" thousands=2000 7.33 % *** 7.727951e-22
timers\\immediate.js type="clear" thousands=2000 20.89 % *** 2.369455e-35
timers\\immediate.js type="depth" thousands=2000 6.78 % *** 1.987398e-38
timers\\immediate.js type="depth1" thousands=2000 7.84 % *** 2.557152e-46
timers\\set-immediate-breadth-args.js millions=5 -4.05 % *** 4.449593e-05
timers\\set-immediate-breadth.js millions=10 16.72 % *** 1.136465e-43
timers\\set-immediate-depth-args.js millions=10 11.82 % *** 5.897423e-39
timers\\set-immediate-depth.js millions=10 1.77 % *** 6.841528e-10
timers\\timers-breadth.js thousands=500 3.36 % *** 4.310861e-24
timers\\timers-cancel-pooled.js thousands=500 1.03 % 1.787179e-01
timers\\timers-cancel-unpooled.js thousands=100 -0.44 % 7.711119e-01
timers\\timers-depth.js thousands=1 0.24 % ** 1.072972e-03
timers\\timers-insert-pooled.js thousands=500 -4.06 % *** 7.462975e-18
timers\\timers-insert-unpooled.js thousands=100 -6.09 % *** 7.852493e-37
timers\\timers-timeout-pooled.js thousands=500 121.48 % *** 4.629659e-30
tls
improvement confidence p.value
tls\\convertprotocols.js n=1 -1.28 % 3.987238e-01
tls\\convertprotocols.js n=50000 -7.17 % *** 1.529057e-17
tls\\throughput.js size=1024 type="asc" dur=5 -0.46 % *** 2.143612e-04
tls\\throughput.js size=1024 type="buf" dur=5 -0.54 % *** 2.668916e-07
tls\\throughput.js size=1024 type="utf" dur=5 -0.53 % *** 2.389609e-06
tls\\throughput.js size=1048576 type="asc" dur=5 -0.53 % *** 1.990643e-09
tls\\throughput.js size=1048576 type="buf" dur=5 -0.52 % *** 1.093546e-12
tls\\throughput.js size=1048576 type="utf" dur=5 -0.80 % *** 3.224579e-13
tls\\throughput.js size=2 type="asc" dur=5 4.04 % *** 7.047651e-15
tls\\throughput.js size=2 type="buf" dur=5 3.99 % *** 6.373564e-12
tls\\throughput.js size=2 type="utf" dur=5 -0.14 % 6.862909e-01
tls\\tls-connect.js dur=5 concurrency=1 -1.55 % *** 1.795457e-07
tls\\tls-connect.js dur=5 concurrency=10 -2.21 % *** 4.948116e-13
url
improvement confidence p.value
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="legacy" type="auth" -34.68 % *** 1.134414e-42
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="legacy" type="dot" -36.20 % *** 3.690335e-38
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="legacy" type="file" -37.51 % *** 1.797921e-72
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="legacy" type="idn" -0.14 % 7.634703e-01
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="legacy" type="javascript" -37.03 % *** 1.103488e-61
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="legacy" type="long" -35.99 % *** 7.285023e-63
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="legacy" type="percent" -37.05 % *** 1.104747e-33
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="legacy" type="short" -36.11 % *** 8.727093e-62
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="legacy" type="ws" -35.67 % *** 1.944222e-38
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="whatwg" type="auth" -48.61 % *** 7.992448e-58
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="whatwg" type="dot" -45.38 % *** 3.662469e-33
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="whatwg" type="file" -47.54 % *** 9.435727e-33
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="whatwg" type="idn" -65.33 % *** 7.051892e-87
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="whatwg" type="javascript" -69.68 % *** 1.603037e-34
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="whatwg" type="long" -43.30 % *** 3.376686e-56
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="whatwg" type="percent" -61.89 % *** 2.388693e-38
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="whatwg" type="short" -44.23 % *** 2.510468e-27
url\\legacy-vs-whatwg-url-get-prop.js n=100000 method="whatwg" type="ws" -55.04 % *** 4.578596e-55
url\\legacy-vs-whatwg-url-parse.js n=100000 method="legacy" type="auth" -12.45 % *** 1.711388e-40
url\\legacy-vs-whatwg-url-parse.js n=100000 method="legacy" type="dot" 0.45 % 1.882933e-01
url\\legacy-vs-whatwg-url-parse.js n=100000 method="legacy" type="file" 98.08 % *** 1.621694e-64
url\\legacy-vs-whatwg-url-parse.js n=100000 method="legacy" type="idn" 1.15 % *** 4.218465e-04
url\\legacy-vs-whatwg-url-parse.js n=100000 method="legacy" type="javascript" 13.76 % *** 1.356816e-50
url\\legacy-vs-whatwg-url-parse.js n=100000 method="legacy" type="long" 2.27 % *** 1.409552e-14
url\\legacy-vs-whatwg-url-parse.js n=100000 method="legacy" type="percent" 96.61 % *** 1.899178e-82
url\\legacy-vs-whatwg-url-parse.js n=100000 method="legacy" type="short" 0.80 % * 1.239411e-02
url\\legacy-vs-whatwg-url-parse.js n=100000 method="legacy" type="ws" 0.85 % ** 9.112197e-03
url\\legacy-vs-whatwg-url-parse.js n=100000 method="whatwg" type="auth" 2.50 % *** 7.503010e-11
url\\legacy-vs-whatwg-url-parse.js n=100000 method="whatwg" type="dot" 7.52 % *** 8.455763e-38
url\\legacy-vs-whatwg-url-parse.js n=100000 method="whatwg" type="file" 7.90 % *** 1.526125e-36
url\\legacy-vs-whatwg-url-parse.js n=100000 method="whatwg" type="idn" 5.55 % *** 2.489551e-43
url\\legacy-vs-whatwg-url-parse.js n=100000 method="whatwg" type="javascript" 12.64 % *** 2.417359e-48
url\\legacy-vs-whatwg-url-parse.js n=100000 method="whatwg" type="long" 6.94 % *** 2.121187e-55
url\\legacy-vs-whatwg-url-parse.js n=100000 method="whatwg" type="percent" 7.66 % *** 5.306395e-46
url\\legacy-vs-whatwg-url-parse.js n=100000 method="whatwg" type="short" 7.11 % *** 2.798048e-42
url\\legacy-vs-whatwg-url-parse.js n=100000 method="whatwg" type="ws" 6.11 % *** 2.729744e-37
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="legacy" type="altspaces" -14.68 % *** 1.929322e-29
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="legacy" type="encodefake" -16.68 % *** 7.459998e-34
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="legacy" type="encodelast" -13.59 % *** 7.181302e-34
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="legacy" type="encodemany" -6.63 % *** 1.324676e-23
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="legacy" type="manyblankpairs" -61.45 % *** 6.221670e-29
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="legacy" type="manypairs" 69.11 % *** 9.437955e-54
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="legacy" type="multicharsep" -13.70 % *** 8.321268e-48
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="legacy" type="multivalue" -11.17 % *** 4.977578e-26
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="legacy" type="multivaluemany" -16.96 % *** 1.765300e-30
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="legacy" type="noencode" -15.45 % *** 3.347243e-36
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="whatwg" type="altspaces" -13.75 % *** 1.404840e-51
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="whatwg" type="encodefake" -10.75 % *** 5.581615e-23
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="whatwg" type="encodelast" -9.40 % *** 2.358757e-32
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="whatwg" type="encodemany" -2.84 % *** 2.638015e-10
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="whatwg" type="manyblankpairs" -31.54 % *** 3.377100e-53
url\\legacy-vs-whatwg-url-searchparams-parse.js n=100000 method="whatwg" type="manypairs" 35.70 % *** 4.250240e-50
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url\\whatwg-url-properties.js n=10000 prop="search" input="dot" 2.82 % *** 2.137876e-07
url\\whatwg-url-properties.js n=10000 prop="search" input="file" 1.59 % 7.033034e-02
url\\whatwg-url-properties.js n=10000 prop="search" input="idn" 1.50 % ** 9.755151e-03
url\\whatwg-url-properties.js n=10000 prop="search" input="javascript" 1.18 % 7.517150e-02
url\\whatwg-url-properties.js n=10000 prop="search" input="long" 3.28 % *** 6.054618e-07
url\\whatwg-url-properties.js n=10000 prop="search" input="percent" 3.34 % *** 3.786630e-09
url\\whatwg-url-properties.js n=10000 prop="search" input="short" 2.76 % *** 1.575200e-04
url\\whatwg-url-properties.js n=10000 prop="search" input="ws" 2.06 % ** 2.509838e-03
url\\whatwg-url-properties.js n=10000 prop="searchParams" input="auth" 170.44 % *** 4.234964e-71
url\\whatwg-url-properties.js n=10000 prop="searchParams" input="dot" 164.03 % *** 9.941064e-68
url\\whatwg-url-properties.js n=10000 prop="searchParams" input="file" 166.02 % *** 2.458205e-62
url\\whatwg-url-properties.js n=10000 prop="searchParams" input="idn" 165.76 % *** 2.372835e-40
url\\whatwg-url-properties.js n=10000 prop="searchParams" input="javascript" 167.64 % *** 2.012943e-55
url\\whatwg-url-properties.js n=10000 prop="searchParams" input="long" 163.47 % *** 1.100228e-36
url\\whatwg-url-properties.js n=10000 prop="searchParams" input="percent" 162.82 % *** 1.198895e-41
url\\whatwg-url-properties.js n=10000 prop="searchParams" input="short" 170.57 % *** 2.259498e-74
url\\whatwg-url-properties.js n=10000 prop="searchParams" input="ws" 165.36 % *** 5.683900e-46
url\\whatwg-url-properties.js n=10000 prop="username" input="auth" 19.15 % *** 2.575329e-34
url\\whatwg-url-properties.js n=10000 prop="username" input="dot" 17.37 % *** 3.630928e-27
url\\whatwg-url-properties.js n=10000 prop="username" input="file" 83.67 % *** 6.575456e-46
url\\whatwg-url-properties.js n=10000 prop="username" input="idn" 17.98 % *** 5.385188e-33
url\\whatwg-url-properties.js n=10000 prop="username" input="javascript" 82.92 % *** 3.592966e-35
url\\whatwg-url-properties.js n=10000 prop="username" input="long" 18.19 % *** 2.593662e-36
url\\whatwg-url-properties.js n=10000 prop="username" input="percent" 18.24 % *** 8.653417e-39
url\\whatwg-url-properties.js n=10000 prop="username" input="short" 15.88 % *** 5.294615e-27
url\\whatwg-url-properties.js n=10000 prop="username" input="ws" 17.22 % *** 6.998943e-27
util
improvement confidence p.value
util\\format.js type="no-replace" n=1000000 3.52 % *** 2.300325e-20
util\\format.js type="number" n=1000000 -72.27 % *** 1.272147e-49
util\\format.js type="object" n=1000000 -31.42 % *** 6.317101e-45
util\\format.js type="string" n=1000000 -72.66 % *** 8.318604e-55
util\\format.js type="unknown" n=1000000 -65.93 % *** 5.048714e-92
util\\inspect-proxy.js n=1000000 v=1 -0.82 % *** 8.354899e-04
util\\inspect-proxy.js n=1000000 v=2 0.43 % 1.797406e-01
util\\inspect.js n=5000000 4.30 % *** 3.568230e-27
util\\normalize-encoding.js n=100000 input="" -57.84 % *** 5.757415e-36
util\\normalize-encoding.js n=100000 input="[]" -8.83 % *** 3.635484e-21
util\\normalize-encoding.js n=100000 input="1" -20.57 % *** 3.098413e-44
util\\normalize-encoding.js n=100000 input="base64" -36.86 % *** 4.703203e-60
util\\normalize-encoding.js n=100000 input="BASE64" -31.97 % *** 5.454870e-58
util\\normalize-encoding.js n=100000 input="binary" -38.93 % *** 2.731996e-35
util\\normalize-encoding.js n=100000 input="BINARY" -32.30 % *** 1.343991e-45
util\\normalize-encoding.js n=100000 input="false" -59.39 % *** 1.940626e-48
util\\normalize-encoding.js n=100000 input="foo" -33.22 % *** 4.522212e-59
util\\normalize-encoding.js n=100000 input="group_common" -33.62 % *** 1.910655e-43
util\\normalize-encoding.js n=100000 input="group_misc" -18.14 % *** 4.468980e-41
util\\normalize-encoding.js n=100000 input="group_uncommon" -38.04 % *** 4.374311e-40
util\\normalize-encoding.js n=100000 input="group_upper" -19.29 % *** 1.042609e-25
util\\normalize-encoding.js n=100000 input="hex" -35.69 % *** 1.748319e-58
util\\normalize-encoding.js n=100000 input="HEX" -32.11 % *** 5.283979e-60
util\\normalize-encoding.js n=100000 input="latin1" -44.70 % *** 6.491027e-53
util\\normalize-encoding.js n=100000 input="ucs2" -45.57 % *** 9.186528e-50
util\\normalize-encoding.js n=100000 input="UCS2" -37.59 % *** 9.180225e-45
util\\normalize-encoding.js n=100000 input="undefined" -59.37 % *** 4.134435e-38
util\\normalize-encoding.js n=100000 input="utf-16le" -44.90 % *** 7.891071e-50
util\\normalize-encoding.js n=100000 input="UTF-16LE" -35.28 % *** 3.941014e-48
util\\normalize-encoding.js n=100000 input="utf-8" -49.98 % *** 2.161624e-54
util\\normalize-encoding.js n=100000 input="utF-8" -33.75 % *** 9.738238e-48
util\\normalize-encoding.js n=100000 input="uTf-8" -33.67 % *** 1.084618e-36
util\\normalize-encoding.js n=100000 input="UTF-8" -35.61 % *** 9.109863e-50
util\\normalize-encoding.js n=100000 input="utf16le" -46.45 % *** 1.365423e-44
util\\normalize-encoding.js n=100000 input="UTF16LE" -34.85 % *** 1.335203e-45
util\\normalize-encoding.js n=100000 input="utf8" -50.38 % *** 1.338962e-58
util\\normalize-encoding.js n=100000 input="Utf8" -37.45 % *** 1.124196e-53
util\\normalize-encoding.js n=100000 input="UTF8" -38.18 % *** 2.279434e-58
vm
improvement confidence p.value
vm/run-in-context.js withSigintListener=0 breakOnSigint=0 n=200000 -1.69 % 1.722634e-01
vm/run-in-context.js withSigintListener=0 breakOnSigint=1 n=200000 0.06 % 9.724491e-01
vm/run-in-context.js withSigintListener=1 breakOnSigint=0 n=200000 -3.25 % *** 9.922300e-04
vm/run-in-context.js withSigintListener=1 breakOnSigint=1 n=200000 0.36 % 7.734769e-01
vm/run-in-this-context.js withSigintListener=0 breakOnSigint=0 n=200000 -3.81 % *** 1.130806e-05
vm/run-in-this-context.js withSigintListener=0 breakOnSigint=1 n=200000 -1.43 % 2.500253e-01
vm/run-in-this-context.js withSigintListener=1 breakOnSigint=0 n=200000 -4.65 % *** 4.163715e-08
vm/run-in-this-context.js withSigintListener=1 breakOnSigint=1 n=200000 0.77 % 5.442813e-01
vm (windows)
improvement confidence p.value
vm\\run-in-context.js withSigintListener=0 breakOnSigint=0 n=1 -0.96 % 5.105984e-01
vm\\run-in-context.js withSigintListener=0 breakOnSigint=1 n=1 -4.87 % * 4.596951e-02
vm\\run-in-context.js withSigintListener=1 breakOnSigint=0 n=1 3.44 % 1.442365e-01
vm\\run-in-context.js withSigintListener=1 breakOnSigint=1 n=1 14.86 % *** 1.086548e-06
vm\\run-in-this-context.js withSigintListener=0 breakOnSigint=0 n=1 -4.59 % *** 6.585714e-05
vm\\run-in-this-context.js withSigintListener=0 breakOnSigint=1 n=1 70.57 % *** 1.027894e-19
vm\\run-in-this-context.js withSigintListener=1 breakOnSigint=0 n=1 -5.60 % *** 2.006588e-07
vm\\run-in-this-context.js withSigintListener=1 breakOnSigint=1 n=1 33.06 % *** 6.418536e-23
I draw your attention particularly to buffers, events, http (!!), querystring, streams, string_decoder, url, util where we have significant losses. These all go to the core competences of Node and you can imagine the articles and blog posts about how far 8.0 LTS regressed.
We do have a couple of wins, es and timers in particular. The gains in es point the way toward what TurboFanScript might look like, or perhaps these are just doing a bit of catch-up on existing ES3/5 perf.
There is https://benchmarking.nodejs.org/, but we have a long way to go before it helps answer these kinds of questions. Currently they are mostly microbenchmarks too, plus AcmeAir (which is a questionable representation of real-world Node IMO) and then there's an Octane benchmark down the bottom where master has a non-trivial dip over 8.x. @nodejs/benchmarking may be able to speak with more authority to the representative nature of all those graphs though.
So, the basic question is what to do with 5.9+? We could go ahead and put it in 8.x. We could wait till 6.0 or 6.1 to do it. We could defer the upgrade till 9.x. But how do we go about answering this question given the complex dependencies (mainly re LTS)?
My personal inclination is to defer till 9.x so we have 2 full cycles to pick up the pieces before an LTS (similar strategy that Ubuntu has pulled off with its major reworks and component replacements—conservative in the LTS branches to lessen potential breakage and make support easier, then liberal in the in-between).
Can others please present alternative proposals with justifications and/or framing?
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