buffer: improve `Buffer.equals` performance #50621

kylo5aby · 2023-11-08T05:04:00Z

improve Buffer.equals performance:

                                                              confidence improvement accuracy (*)   (**)  (***)
buffers/buffer-equals.js n=1000000 difflen='false' size=0            ***    147.60 %       ±1.94% ±2.58% ±3.37%
buffers/buffer-equals.js n=1000000 difflen='false' size=16386        ***      5.47 %       ±2.92% ±3.93% ±5.22%
buffers/buffer-equals.js n=1000000 difflen='false' size=512          ***     34.73 %       ±0.85% ±1.13% ±1.48%
buffers/buffer-equals.js n=1000000 difflen='true' size=0             ***     82.37 %       ±3.70% ±4.98% ±6.60%
buffers/buffer-equals.js n=1000000 difflen='true' size=16386         ***     85.01 %       ±1.84% ±2.45% ±3.19%
buffers/buffer-equals.js n=1000000 difflen='true' size=512           ***     82.84 %       ±3.14% ±4.20% ±5.53%

As mentioned in #50620 , the performance regression of Buffer.byteLength might be due
to ArrayBufferView.byteLength, reduce the property access of Buffer.byteLength
helps to reduce regression for Buffer.equals

Inspired by the comment from @aduh95, using TypedArrayPrototypeGetByteLength
also improves performance.

Refs: #50620

nodejs-github-bot · 2023-11-08T05:24:48Z

CI: https://ci.nodejs.org/job/node-test-pull-request/55489/

aduh95 · 2023-11-08T09:09:56Z

lib/buffer.js

    return true;
-
-  if (this.byteLength !== otherBuffer.byteLength)
+  const len = this.byteLength;


Could you try with TypedArrayPrototypeGetByteLength from primordials? I'd be curious to see if that would improve perf further or not.

Good suggestion. I have tried TypedArrayPrototypeGetByteLength. As you can see in the updated benchmark result, it improved a lot.

lib/buffer.js

aduh95 · 2023-11-08T14:19:19Z

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1470/

Results

confidence improvement accuracy (*)    (**)   (***)
buffers/buffer-base64-decode-wrapped.js n=32 linesCount=524288 charsPerLine=76                                                                                 -0.20 %       ±0.58%  ±0.78%  ±1.01%
buffers/buffer-base64-decode.js size=8388608 n=32                                                                                                               0.07 %       ±0.86%  ±1.14%  ±1.49%
buffers/buffer-base64-encode.js n=32 len=67108864                                                                                                               0.37 %       ±1.20%  ±1.60%  ±2.08%
buffers/buffer-base64url-decode.js size=8388608 n=32                                                                                                            0.38 %       ±0.70%  ±0.93%  ±1.21%
buffers/buffer-base64url-encode.js n=32 len=67108864                                                                                                           -0.01 %       ±0.37%  ±0.49%  ±0.63%
buffers/buffer-bytelength-buffer.js n=4000000 len=16                                                                                                           -2.14 %      ±10.08% ±13.41% ±17.45%
buffers/buffer-bytelength-buffer.js n=4000000 len=2                                                                                                            -4.59 %       ±9.36% ±12.46% ±16.23%
buffers/buffer-bytelength-buffer.js n=4000000 len=256                                                                                                           0.17 %       ±9.88% ±13.15% ±17.12%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='four_bytes'                                                                     -1.73 %       ±4.99%  ±6.64%  ±8.64%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='one_byte'                                                                       -2.10 %       ±5.60%  ±7.45%  ±9.70%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='three_bytes'                                                             **     -7.48 %       ±4.93%  ±6.56%  ±8.54%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='two_bytes'                                                                       1.35 %       ±5.68%  ±7.55%  ±9.84%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='four_bytes'                                                                        0.62 %       ±3.03%  ±4.04%  ±5.25%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='one_byte'                                                                         -0.62 %       ±6.98%  ±9.28% ±12.08%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='three_bytes'                                                                       2.69 %       ±3.22%  ±4.29%  ±5.58%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='two_bytes'                                                                        -1.67 %       ±3.71%  ±4.93%  ±6.42%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='four_bytes'                                                                    -1.96 %       ±5.86%  ±7.80% ±10.15%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='one_byte'                                                                      -3.82 %       ±5.47%  ±7.29%  ±9.51%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='three_bytes'                                                             *      7.19 %       ±5.95%  ±7.91% ±10.30%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='two_bytes'                                                                     -2.75 %       ±5.12%  ±6.82%  ±8.88%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='four_bytes'                                                                       0.20 %       ±0.45%  ±0.60%  ±0.78%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='one_byte'                                                                        -1.87 %       ±3.41%  ±4.53%  ±5.90%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='three_bytes'                                                                      0.07 %       ±1.03%  ±1.38%  ±1.79%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='two_bytes'                                                                       -0.52 %       ±1.06%  ±1.41%  ±1.84%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='four_bytes'                                                               *     -6.65 %       ±5.36%  ±7.13%  ±9.29%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='one_byte'                                                                       -0.80 %       ±5.44%  ±7.23%  ±9.42%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='three_bytes'                                                                     1.69 %       ±5.29%  ±7.04%  ±9.16%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='two_bytes'                                                                      -5.04 %       ±5.74%  ±7.63%  ±9.94%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='four_bytes'                                                                        0.45 %       ±1.72%  ±2.29%  ±2.99%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='one_byte'                                                                         -0.14 %       ±5.19%  ±6.90%  ±8.99%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='three_bytes'                                                                       0.22 %       ±2.17%  ±2.89%  ±3.76%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='two_bytes'                                                                        -1.43 %       ±2.36%  ±3.14%  ±4.08%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='four_bytes'                                                                   -0.94 %       ±4.90%  ±6.52%  ±8.48%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='one_byte'                                                                     -1.18 %       ±5.77%  ±7.67%  ±9.99%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='three_bytes'                                                            *      6.35 %       ±5.43%  ±7.23%  ±9.42%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='two_bytes'                                                                    -3.87 %       ±5.42%  ±7.22%  ±9.42%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='four_bytes'                                                                     -0.00 %       ±0.06%  ±0.07%  ±0.10%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='one_byte'                                                                       -0.20 %       ±0.58%  ±0.77%  ±1.00%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='three_bytes'                                                                    -0.05 %       ±0.11%  ±0.14%  ±0.18%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='two_bytes'                                                                       0.04 %       ±0.11%  ±0.14%  ±0.19%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=16                                                                                             -2.09 %       ±9.56% ±12.72% ±16.55%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=16386                                                                                    *      2.93 %       ±2.81%  ±3.75%  ±4.90%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=4096                                                                                            3.38 %       ±7.61% ±10.13% ±13.19%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=512                                                                                      *    -12.01 %       ±9.62% ±12.80% ±16.67%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=16                                                                                              1.50 %       ±7.88% ±10.49% ±13.67%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=16386                                                                                           2.31 %       ±2.67%  ±3.55%  ±4.62%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=4096                                                                                     *     -6.47 %       ±6.43%  ±8.56% ±11.14%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=512                                                                                             9.74 %      ±10.71% ±14.25% ±18.55%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=16                                                                                              2.73 %      ±10.48% ±13.95% ±18.17%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=16386                                                                                    *      2.75 %       ±2.10%  ±2.79%  ±3.63%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=4096                                                                                            2.58 %       ±6.00%  ±7.98% ±10.39%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=512                                                                                            -0.53 %       ±8.88% ±11.82% ±15.38%
buffers/buffer-compare-offset.js n=1000000 size=16 method='offset'                                                                                              6.77 %      ±10.51% ±13.98% ±18.20%
buffers/buffer-compare-offset.js n=1000000 size=16 method='slice'                                                                                               0.98 %       ±4.27%  ±5.68%  ±7.40%
buffers/buffer-compare-offset.js n=1000000 size=16386 method='offset'                                                                                           1.28 %       ±9.47% ±12.60% ±16.40%
buffers/buffer-compare-offset.js n=1000000 size=16386 method='slice'                                                                                            0.51 %       ±3.64%  ±4.84%  ±6.30%
buffers/buffer-compare-offset.js n=1000000 size=4096 method='offset'                                                                                           -4.31 %       ±9.12% ±12.14% ±15.80%
buffers/buffer-compare-offset.js n=1000000 size=4096 method='slice'                                                                                            -0.91 %       ±3.26%  ±4.33%  ±5.64%
buffers/buffer-compare-offset.js n=1000000 size=512 method='offset'                                                                                            -2.52 %       ±9.88% ±13.15% ±17.12%
buffers/buffer-compare-offset.js n=1000000 size=512 method='slice'                                                                                              0.81 %       ±3.75%  ±5.00%  ±6.50%
buffers/buffer-compare.js n=1000000 size=16                                                                                                                     4.40 %       ±8.57% ±11.42% ±14.90%
buffers/buffer-compare.js n=1000000 size=16386                                                                                                           *      3.28 %       ±2.65%  ±3.53%  ±4.59%
buffers/buffer-compare.js n=1000000 size=4096                                                                                                                  -3.33 %       ±8.51% ±11.32% ±14.73%
buffers/buffer-compare.js n=1000000 size=512                                                                                                                   -3.93 %      ±10.07% ±13.40% ±17.45%
buffers/buffer-concat-fill.js n=800000 extraSize=1                                                                                                             -1.83 %       ±5.37%  ±7.15%  ±9.30%
buffers/buffer-concat-fill.js n=800000 extraSize=1024                                                                                                          -0.60 %       ±2.30%  ±3.07%  ±4.01%
buffers/buffer-concat-fill.js n=800000 extraSize=256                                                                                                           -0.08 %       ±3.58%  ±4.76%  ±6.21%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=1 pieces=16                                                                                       0.95 %       ±3.86%  ±5.14%  ±6.69%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=1 pieces=4                                                                                       -0.94 %       ±8.76% ±11.66% ±15.17%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=16 pieces=16                                                                                      0.52 %       ±3.11%  ±4.13%  ±5.38%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=16 pieces=4                                                                                      -1.57 %       ±7.98% ±10.63% ±13.84%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=256 pieces=16                                                                                    -0.17 %       ±1.25%  ±1.66%  ±2.16%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=256 pieces=4                                                                                      1.53 %       ±3.30%  ±4.39%  ±5.72%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=1 pieces=16                                                                                       2.03 %       ±2.98%  ±3.97%  ±5.17%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=1 pieces=4                                                                                       -1.02 %       ±8.85% ±11.77% ±15.33%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=16 pieces=16                                                                               *      4.52 %       ±3.85%  ±5.12%  ±6.66%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=16 pieces=4                                                                                       0.15 %       ±7.87% ±10.47% ±13.63%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=256 pieces=16                                                                                    -0.95 %       ±1.20%  ±1.60%  ±2.09%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=256 pieces=4                                                                                     -1.15 %       ±3.11%  ±4.14%  ±5.39%
buffers/buffer-copy.js n=6000000 partial='false' bytes=0                                                                                                       -1.95 %       ±9.07% ±12.07% ±15.71%
buffers/buffer-copy.js n=6000000 partial='true' bytes=128                                                                                                       0.53 %       ±1.78%  ±2.37%  ±3.08%
buffers/buffer-copy.js n=6000000 partial='true' bytes=32768                                                                                                    -1.62 %       ±3.18%  ±4.23%  ±5.50%
buffers/buffer-copy.js n=6000000 partial='true' bytes=8                                                                                                         0.05 %       ±2.02%  ±2.69%  ±3.50%
buffers/buffer-creation.js n=600000 len=10 type='fast-alloc-fill'                                                                                              -4.61 %       ±9.74% ±12.97% ±16.88%
buffers/buffer-creation.js n=600000 len=10 type='fast-alloc'                                                                                                   -2.35 %       ±6.29%  ±8.37% ±10.92%
buffers/buffer-creation.js n=600000 len=10 type='fast-allocUnsafe'                                                                                              3.85 %       ±6.95%  ±9.25% ±12.04%
buffers/buffer-creation.js n=600000 len=10 type='slow-allocUnsafe'                                                                                              7.14 %      ±10.02% ±13.34% ±17.36%
buffers/buffer-creation.js n=600000 len=1024 type='fast-alloc-fill'                                                                                            -0.62 %       ±1.41%  ±1.88%  ±2.45%
buffers/buffer-creation.js n=600000 len=1024 type='fast-alloc'                                                                                                 -1.10 %       ±1.93%  ±2.57%  ±3.35%
buffers/buffer-creation.js n=600000 len=1024 type='fast-allocUnsafe'                                                                                            1.84 %       ±5.43%  ±7.23%  ±9.41%
buffers/buffer-creation.js n=600000 len=1024 type='slow-allocUnsafe'                                                                                            1.35 %       ±2.04%  ±2.71%  ±3.53%
buffers/buffer-creation.js n=600000 len=4096 type='fast-alloc-fill'                                                                                             0.04 %       ±1.63%  ±2.17%  ±2.83%
buffers/buffer-creation.js n=600000 len=4096 type='fast-alloc'                                                                                                  0.51 %       ±1.36%  ±1.80%  ±2.35%
buffers/buffer-creation.js n=600000 len=4096 type='fast-allocUnsafe'                                                                                            0.33 %       ±2.17%  ±2.89%  ±3.76%
buffers/buffer-creation.js n=600000 len=4096 type='slow-allocUnsafe'                                                                                            0.20 %       ±1.60%  ±2.13%  ±2.77%
buffers/buffer-creation.js n=600000 len=8192 type='fast-alloc-fill'                                                                                            -0.38 %       ±1.77%  ±2.36%  ±3.07%
buffers/buffer-creation.js n=600000 len=8192 type='fast-alloc'                                                                                                  0.74 %       ±1.37%  ±1.82%  ±2.37%
buffers/buffer-creation.js n=600000 len=8192 type='fast-allocUnsafe'                                                                                     *     -1.47 %       ±1.36%  ±1.82%  ±2.38%
buffers/buffer-creation.js n=600000 len=8192 type='slow-allocUnsafe'                                                                                            0.70 %       ±1.85%  ±2.46%  ±3.20%
buffers/buffer-equals.js n=1000000 difflen='false' size=0                                                                                              ***    128.08 %      ±13.06% ±17.43% ±22.77%
buffers/buffer-equals.js n=1000000 difflen='false' size=16386                                                                                          ***     -9.56 %       ±3.14%  ±4.18%  ±5.44%
buffers/buffer-equals.js n=1000000 difflen='false' size=512                                                                                            ***     39.88 %      ±11.28% ±15.08% ±19.79%
buffers/buffer-equals.js n=1000000 difflen='true' size=0                                                                                               ***     72.04 %       ±9.32% ±12.41% ±16.16%
buffers/buffer-equals.js n=1000000 difflen='true' size=16386                                                                                           ***     60.21 %      ±12.47% ±16.61% ±21.66%
buffers/buffer-equals.js n=1000000 difflen='true' size=512                                                                                             ***     66.80 %       ±9.09% ±12.09% ±15.74%
buffers/buffer-fill.js n=20000 size=65536 type='fill("")'                                                                                                *     -2.32 %       ±2.14%  ±2.85%  ±3.72%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t", "utf8")'                                                                                              1.43 %       ±3.60%  ±4.79%  ±6.24%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t", 0, "utf8")'                                                                                           0.12 %       ±3.32%  ±4.41%  ±5.74%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t", 0)'                                                                                                   0.77 %       ±3.57%  ±4.74%  ±6.18%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t")'                                                                                                     -2.50 %       ±3.82%  ±5.08%  ±6.63%
buffers/buffer-fill.js n=20000 size=65536 type='fill("test")'                                                                                                  -2.28 %       ±5.47%  ±7.28%  ±9.50%
buffers/buffer-fill.js n=20000 size=65536 type='fill(0)'                                                                                                        1.69 %       ±1.82%  ±2.43%  ±3.16%
buffers/buffer-fill.js n=20000 size=65536 type='fill(100)'                                                                                                     -2.03 %       ±3.97%  ±5.32%  ±7.00%
buffers/buffer-fill.js n=20000 size=65536 type='fill(400)'                                                                                                      1.09 %       ±4.85%  ±6.46%  ±8.43%
buffers/buffer-fill.js n=20000 size=65536 type='fill(Buffer.alloc(1), 0)'                                                                                      -0.03 %       ±4.10%  ±5.45%  ±7.10%
buffers/buffer-fill.js n=20000 size=8192 type='fill("")'                                                                                               ***     11.83 %       ±4.89%  ±6.50%  ±8.46%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t", "utf8")'                                                                                               2.40 %       ±4.64%  ±6.17%  ±8.03%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t", 0, "utf8")'                                                                                    **      8.13 %       ±5.01%  ±6.69%  ±8.76%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t", 0)'                                                                                           ***     11.58 %       ±5.45%  ±7.25%  ±9.44%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t")'                                                                                              ***     10.82 %       ±5.06%  ±6.73%  ±8.76%
buffers/buffer-fill.js n=20000 size=8192 type='fill("test")'                                                                                                    3.84 %       ±6.36%  ±8.47% ±11.04%
buffers/buffer-fill.js n=20000 size=8192 type='fill(0)'                                                                                                ***     23.21 %       ±7.64% ±10.18% ±13.29%
buffers/buffer-fill.js n=20000 size=8192 type='fill(100)'                                                                                              ***     14.54 %       ±6.86%  ±9.15% ±11.95%
buffers/buffer-fill.js n=20000 size=8192 type='fill(400)'                                                                                              ***     19.85 %       ±7.32%  ±9.74% ±12.69%
buffers/buffer-fill.js n=20000 size=8192 type='fill(Buffer.alloc(1), 0)'                                                                                        3.14 %       ±4.19%  ±5.58%  ±7.26%
buffers/buffer-from.js n=800000 len=100 source='array'                                                                                                          0.24 %       ±7.16%  ±9.54% ±12.42%
buffers/buffer-from.js n=800000 len=100 source='arraybuffer-middle'                                                                                             2.53 %      ±11.05% ±14.70% ±19.13%
buffers/buffer-from.js n=800000 len=100 source='arraybuffer'                                                                                                   -6.11 %       ±9.11% ±12.13% ±15.80%
buffers/buffer-from.js n=800000 len=100 source='buffer'                                                                                                        -5.49 %       ±8.40% ±11.18% ±14.55%
buffers/buffer-from.js n=800000 len=100 source='object'                                                                                                        -1.04 %       ±9.86% ±13.12% ±17.07%
buffers/buffer-from.js n=800000 len=100 source='string-base64'                                                                                                  2.38 %       ±3.94%  ±5.24%  ±6.83%
buffers/buffer-from.js n=800000 len=100 source='string-utf8'                                                                                                    0.46 %       ±5.81%  ±7.73% ±10.06%
buffers/buffer-from.js n=800000 len=100 source='string'                                                                                                         2.26 %       ±5.50%  ±7.33%  ±9.54%
buffers/buffer-from.js n=800000 len=100 source='uint16array'                                                                                                    3.81 %       ±7.14%  ±9.51% ±12.37%
buffers/buffer-from.js n=800000 len=100 source='uint8array'                                                                                                    -1.99 %       ±8.41% ±11.19% ±14.56%
buffers/buffer-from.js n=800000 len=2048 source='array'                                                                                                  *      1.49 %       ±1.25%  ±1.67%  ±2.18%
buffers/buffer-from.js n=800000 len=2048 source='arraybuffer-middle'                                                                                           -7.81 %       ±9.98% ±13.29% ±17.30%
buffers/buffer-from.js n=800000 len=2048 source='arraybuffer'                                                                                                  -8.89 %      ±10.24% ±13.62% ±17.73%
buffers/buffer-from.js n=800000 len=2048 source='buffer'                                                                                                        0.90 %       ±1.69%  ±2.26%  ±2.94%
buffers/buffer-from.js n=800000 len=2048 source='object'                                                                                                       -1.47 %      ±10.25% ±13.64% ±17.75%
buffers/buffer-from.js n=800000 len=2048 source='string-base64'                                                                                                 0.82 %       ±1.52%  ±2.03%  ±2.65%
buffers/buffer-from.js n=800000 len=2048 source='string-utf8'                                                                                                   0.41 %       ±1.76%  ±2.35%  ±3.05%
buffers/buffer-from.js n=800000 len=2048 source='string'                                                                                                       -0.52 %       ±1.54%  ±2.06%  ±2.68%
buffers/buffer-from.js n=800000 len=2048 source='uint16array'                                                                                                  -0.17 %       ±2.53%  ±3.37%  ±4.38%
buffers/buffer-from.js n=800000 len=2048 source='uint8array'                                                                                                    0.93 %       ±2.12%  ±2.82%  ±3.68%
buffers/buffer-hex-decode.js n=1000000 len=1024                                                                                                                 0.19 %       ±0.64%  ±0.85%  ±1.11%
buffers/buffer-hex-decode.js n=1000000 len=64                                                                                                                   2.28 %       ±3.85%  ±5.12%  ±6.67%
buffers/buffer-hex-encode.js n=1000000 len=1024                                                                                                                -0.60 %       ±1.57%  ±2.09%  ±2.73%
buffers/buffer-hex-encode.js n=1000000 len=64                                                                                                                   0.96 %       ±5.38%  ±7.16%  ±9.32%
buffers/buffer-indexof-number.js n=1000000 value=64                                                                                                            -6.43 %       ±7.77% ±10.38% ±13.58%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='--l'                                                                              -3.92 %       ±5.14%  ±6.85%  ±8.91%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='@'                                                                                -0.24 %       ±5.29%  ±7.04%  ±9.17%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='</i> to the Caterpillar'                                                          -0.20 %       ±1.28%  ±1.71%  ±2.22%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='aaaaaaaaaaaaaaaaa'                                                                -0.30 %       ±1.73%  ±2.31%  ±3.00%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='Alice'                                                                             1.66 %       ±7.47%  ±9.94% ±12.94%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='found it very'                                                                     0.45 %       ±0.72%  ±0.96%  ±1.25%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='Gryphon'                                                                          -4.42 %       ±9.68% ±12.88% ±16.76%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='neighbouring pool'                                                                -0.18 %       ±0.92%  ±1.23%  ±1.60%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='Ou est ma chatte?'                                                                -0.39 %       ±2.40%  ±3.19%  ±4.16%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='SQ'                                                                               -0.78 %       ±7.75% ±10.31% ±13.42%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='venture to go near the house till she had brought herself down to'                -1.49 %       ±2.04%  ±2.72%  ±3.54%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='--l'                                                                                   -0.13 %       ±3.60%  ±4.78%  ±6.23%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='@'                                                                                      1.03 %       ±6.15%  ±8.19% ±10.66%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='</i> to the Caterpillar'                                                               -0.39 %       ±1.26%  ±1.68%  ±2.19%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='aaaaaaaaaaaaaaaaa'                                                                      0.04 %       ±2.40%  ±3.20%  ±4.17%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='Alice'                                                                                  4.59 %       ±9.37% ±12.47% ±16.23%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='found it very'                                                                         -0.69 %       ±0.94%  ±1.26%  ±1.64%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='Gryphon'                                                                               -2.00 %       ±4.39%  ±5.85%  ±7.62%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='neighbouring pool'                                                                      0.46 %       ±1.26%  ±1.68%  ±2.19%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='Ou est ma chatte?'                                                                      1.04 %       ±2.55%  ±3.39%  ±4.41%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='SQ'                                                                                     0.31 %       ±8.01% ±10.66% ±13.88%
buffers/buffer-indexof.js n=50000 type='string' encoding='ucs2' search='venture to go near the house till she had brought herself down to'                      0.14 %       ±1.60%  ±2.13%  ±2.77%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='--l'                                                                                    2.00 %       ±5.38%  ±7.16%  ±9.32%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='@'                                                                               *      6.42 %       ±5.26%  ±7.03%  ±9.21%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='</i> to the Caterpillar'                                                                0.06 %       ±1.30%  ±1.73%  ±2.25%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='aaaaaaaaaaaaaaaaa'                                                                      0.24 %       ±1.92%  ±2.56%  ±3.33%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='Alice'                                                                                  1.06 %       ±9.37% ±12.46% ±16.22%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='found it very'                                                                         -0.35 %       ±0.80%  ±1.06%  ±1.38%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='Gryphon'                                                                                2.08 %       ±8.32% ±11.07% ±14.41%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='neighbouring pool'                                                                     -0.46 %       ±0.85%  ±1.12%  ±1.46%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='Ou est ma chatte?'                                                                     -1.20 %       ±1.64%  ±2.19%  ±2.84%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='SQ'                                                                                    -4.29 %       ±7.96% ±10.61% ±13.84%
buffers/buffer-indexof.js n=50000 type='string' encoding='utf8' search='venture to go near the house till she had brought herself down to'                      0.84 %       ±1.76%  ±2.35%  ±3.06%
buffers/buffer-iterate.js n=1000 method='for' type='fast' size=16386                                                                                    **     -9.23 %       ±6.05%  ±8.16% ±10.83%
buffers/buffer-iterate.js n=1000 method='for' type='fast' size=4096                                                                                            -3.64 %       ±4.18%  ±5.58%  ±7.27%
buffers/buffer-iterate.js n=1000 method='for' type='fast' size=512                                                                                              1.20 %       ±2.88%  ±3.84%  ±5.00%
buffers/buffer-iterate.js n=1000 method='forOf' type='fast' size=16386                                                                                          0.78 %       ±7.36%  ±9.79% ±12.74%
buffers/buffer-iterate.js n=1000 method='forOf' type='fast' size=4096                                                                                           0.94 %       ±2.54%  ±3.42%  ±4.53%
buffers/buffer-iterate.js n=1000 method='forOf' type='fast' size=512                                                                                           -0.93 %       ±2.19%  ±2.92%  ±3.80%
buffers/buffer-iterate.js n=1000 method='iterator' type='fast' size=16386                                                                                      -4.94 %       ±6.85%  ±9.14% ±11.95%
buffers/buffer-iterate.js n=1000 method='iterator' type='fast' size=4096                                                                                        0.93 %       ±6.10%  ±8.11% ±10.56%
buffers/buffer-iterate.js n=1000 method='iterator' type='fast' size=512                                                                                        -1.35 %       ±2.70%  ±3.60%  ±4.69%
buffers/buffer-normalize-encoding.js n=1000000 encoding='ascii'                                                                                                -0.36 %       ±1.40%  ±1.86%  ±2.42%
buffers/buffer-normalize-encoding.js n=1000000 encoding='base64'                                                                                               -0.70 %       ±1.19%  ±1.59%  ±2.07%
buffers/buffer-normalize-encoding.js n=1000000 encoding='BASE64'                                                                                                0.14 %       ±0.80%  ±1.06%  ±1.38%
buffers/buffer-normalize-encoding.js n=1000000 encoding='binary'                                                                                                0.21 %       ±0.89%  ±1.18%  ±1.54%
buffers/buffer-normalize-encoding.js n=1000000 encoding='hex'                                                                                                  -0.76 %       ±1.32%  ±1.75%  ±2.28%
buffers/buffer-normalize-encoding.js n=1000000 encoding='HEX'                                                                                                  -0.52 %       ±1.25%  ±1.66%  ±2.16%
buffers/buffer-normalize-encoding.js n=1000000 encoding='latin1'                                                                                                0.39 %       ±1.27%  ±1.69%  ±2.20%
buffers/buffer-normalize-encoding.js n=1000000 encoding='LATIN1'                                                                                                0.15 %       ±0.79%  ±1.05%  ±1.37%
buffers/buffer-normalize-encoding.js n=1000000 encoding='UCS-2'                                                                                                -0.50 %       ±0.99%  ±1.32%  ±1.73%
buffers/buffer-normalize-encoding.js n=1000000 encoding='UCS2'                                                                                                  2.52 %       ±2.83%  ±3.80%  ±5.02%
buffers/buffer-normalize-encoding.js n=1000000 encoding='utf-16le'                                                                                             -1.44 %       ±2.64%  ±3.54%  ±4.65%
buffers/buffer-normalize-encoding.js n=1000000 encoding='UTF-16LE'                                                                                       *     -1.11 %       ±1.05%  ±1.39%  ±1.81%
buffers/buffer-normalize-encoding.js n=1000000 encoding='utf-8'                                                                                                -0.74 %       ±2.45%  ±3.27%  ±4.29%
buffers/buffer-normalize-encoding.js n=1000000 encoding='utf16le'                                                                                              -2.64 %       ±2.73%  ±3.66%  ±4.81%
buffers/buffer-normalize-encoding.js n=1000000 encoding='UTF16LE'                                                                                              -0.40 %       ±1.14%  ±1.51%  ±1.97%
buffers/buffer-normalize-encoding.js n=1000000 encoding='utf8'                                                                                                 -1.04 %       ±2.32%  ±3.09%  ±4.02%
buffers/buffer-normalize-encoding.js n=1000000 encoding='UTF8'                                                                                                 -0.79 %       ±1.35%  ±1.79%  ±2.33%
buffers/buffer-read-float.js n=1000000 value='big' endian='LE' type='Double'                                                                                    0.33 %       ±0.91%  ±1.22%  ±1.59%
buffers/buffer-read-float.js n=1000000 value='big' endian='LE' type='Float'                                                                                    -0.63 %       ±1.30%  ±1.73%  ±2.26%
buffers/buffer-read-float.js n=1000000 value='inf' endian='LE' type='Double'                                                                                    0.30 %       ±0.83%  ±1.11%  ±1.45%
buffers/buffer-read-float.js n=1000000 value='inf' endian='LE' type='Float'                                                                                     1.36 %       ±2.60%  ±3.48%  ±4.60%
buffers/buffer-read-float.js n=1000000 value='nan' endian='LE' type='Double'                                                                                   -0.12 %       ±1.04%  ±1.38%  ±1.80%
buffers/buffer-read-float.js n=1000000 value='nan' endian='LE' type='Float'                                                                                    -0.46 %       ±1.27%  ±1.70%  ±2.22%
buffers/buffer-read-float.js n=1000000 value='small' endian='LE' type='Double'                                                                                 -0.07 %       ±0.77%  ±1.03%  ±1.34%
buffers/buffer-read-float.js n=1000000 value='small' endian='LE' type='Float'                                                                                  -0.32 %       ±1.41%  ±1.88%  ±2.45%
buffers/buffer-read-float.js n=1000000 value='zero' endian='LE' type='Double'                                                                                   0.01 %       ±0.72%  ±0.97%  ±1.26%
buffers/buffer-read-float.js n=1000000 value='zero' endian='LE' type='Float'                                                                                   -1.04 %       ±2.34%  ±3.11%  ±4.05%
buffers/buffer-read-with-byteLength.js byteLength=1 n=1000000 type='IntBE' buffer='fast'                                                                       -0.02 %       ±0.72%  ±0.96%  ±1.26%
buffers/buffer-read-with-byteLength.js byteLength=1 n=1000000 type='IntLE' buffer='fast'                                                                **     -0.96 %       ±0.69%  ±0.92%  ±1.20%
buffers/buffer-read-with-byteLength.js byteLength=1 n=1000000 type='UIntBE' buffer='fast'                                                                      -0.17 %       ±0.82%  ±1.09%  ±1.43%
buffers/buffer-read-with-byteLength.js byteLength=1 n=1000000 type='UIntLE' buffer='fast'                                                               **      1.15 %       ±0.66%  ±0.88%  ±1.15%
buffers/buffer-read-with-byteLength.js byteLength=2 n=1000000 type='IntBE' buffer='fast'                                                                        0.60 %       ±1.32%  ±1.77%  ±2.32%
buffers/buffer-read-with-byteLength.js byteLength=2 n=1000000 type='IntLE' buffer='fast'                                                                        0.63 %       ±0.79%  ±1.05%  ±1.36%
buffers/buffer-read-with-byteLength.js byteLength=2 n=1000000 type='UIntBE' buffer='fast'                                                                       0.77 %       ±1.49%  ±2.00%  ±2.63%
buffers/buffer-read-with-byteLength.js byteLength=2 n=1000000 type='UIntLE' buffer='fast'                                                               **      1.19 %       ±0.73%  ±0.97%  ±1.26%
buffers/buffer-read-with-byteLength.js byteLength=3 n=1000000 type='IntBE' buffer='fast'                                                                       -0.22 %       ±0.93%  ±1.23%  ±1.61%
buffers/buffer-read-with-byteLength.js byteLength=3 n=1000000 type='IntLE' buffer='fast'                                                                        0.28 %       ±0.94%  ±1.25%  ±1.63%
buffers/buffer-read-with-byteLength.js byteLength=3 n=1000000 type='UIntBE' buffer='fast'                                                                       0.16 %       ±0.86%  ±1.14%  ±1.49%
buffers/buffer-read-with-byteLength.js byteLength=3 n=1000000 type='UIntLE' buffer='fast'                                                                       0.20 %       ±0.93%  ±1.23%  ±1.60%
buffers/buffer-read-with-byteLength.js byteLength=4 n=1000000 type='IntBE' buffer='fast'                                                                       -0.39 %       ±0.68%  ±0.90%  ±1.17%
buffers/buffer-read-with-byteLength.js byteLength=4 n=1000000 type='IntLE' buffer='fast'                                                                       -0.70 %       ±0.70%  ±0.94%  ±1.22%
buffers/buffer-read-with-byteLength.js byteLength=4 n=1000000 type='UIntBE' buffer='fast'                                                                       0.07 %       ±0.76%  ±1.01%  ±1.32%
buffers/buffer-read-with-byteLength.js byteLength=4 n=1000000 type='UIntLE' buffer='fast'                                                                      -0.30 %       ±0.69%  ±0.91%  ±1.19%
buffers/buffer-read-with-byteLength.js byteLength=5 n=1000000 type='IntBE' buffer='fast'                                                                       -0.21 %       ±0.99%  ±1.31%  ±1.71%
buffers/buffer-read-with-byteLength.js byteLength=5 n=1000000 type='IntLE' buffer='fast'                                                                       -0.07 %       ±0.98%  ±1.31%  ±1.71%
buffers/buffer-read-with-byteLength.js byteLength=5 n=1000000 type='UIntBE' buffer='fast'                                                                      -1.57 %       ±1.93%  ±2.57%  ±3.34%
buffers/buffer-read-with-byteLength.js byteLength=5 n=1000000 type='UIntLE' buffer='fast'                                                                      -0.48 %       ±1.72%  ±2.30%  ±3.04%
buffers/buffer-read-with-byteLength.js byteLength=6 n=1000000 type='IntBE' buffer='fast'                                                                        0.76 %       ±1.07%  ±1.42%  ±1.85%
buffers/buffer-read-with-byteLength.js byteLength=6 n=1000000 type='IntLE' buffer='fast'                                                                       -0.80 %       ±1.38%  ±1.84%  ±2.41%
buffers/buffer-read-with-byteLength.js byteLength=6 n=1000000 type='UIntBE' buffer='fast'                                                                       0.27 %       ±0.86%  ±1.15%  ±1.50%
buffers/buffer-read-with-byteLength.js byteLength=6 n=1000000 type='UIntLE' buffer='fast'                                                                      -1.21 %       ±1.24%  ±1.66%  ±2.18%
buffers/buffer-read.js n=1000000 type='BigInt64BE' buffer='fast'                                                                                               -0.83 %       ±1.32%  ±1.76%  ±2.29%
buffers/buffer-read.js n=1000000 type='BigInt64LE' buffer='fast'                                                                                               -0.24 %       ±1.30%  ±1.73%  ±2.25%
buffers/buffer-read.js n=1000000 type='BigUInt64BE' buffer='fast'                                                                                              -0.07 %       ±1.15%  ±1.53%  ±1.99%
buffers/buffer-read.js n=1000000 type='BigUInt64LE' buffer='fast'                                                                                              -0.19 %       ±1.37%  ±1.83%  ±2.40%
buffers/buffer-read.js n=1000000 type='Int16BE' buffer='fast'                                                                                                  -2.09 %       ±2.90%  ±3.89%  ±5.13%
buffers/buffer-read.js n=1000000 type='Int16LE' buffer='fast'                                                                                                  -0.07 %       ±1.12%  ±1.49%  ±1.94%
buffers/buffer-read.js n=1000000 type='Int32BE' buffer='fast'                                                                                                  -0.59 %       ±3.28%  ±4.41%  ±5.84%
buffers/buffer-read.js n=1000000 type='Int32LE' buffer='fast'                                                                                                   0.38 %       ±1.18%  ±1.57%  ±2.05%
buffers/buffer-read.js n=1000000 type='Int8' buffer='fast'                                                                                                      0.87 %       ±1.16%  ±1.54%  ±2.00%
buffers/buffer-read.js n=1000000 type='UInt16BE' buffer='fast'                                                                                                  0.64 %       ±1.12%  ±1.50%  ±1.95%
buffers/buffer-read.js n=1000000 type='UInt16LE' buffer='fast'                                                                                                 -0.79 %       ±1.02%  ±1.36%  ±1.77%
buffers/buffer-read.js n=1000000 type='UInt32BE' buffer='fast'                                                                                                 -0.50 %       ±1.39%  ±1.85%  ±2.40%
buffers/buffer-read.js n=1000000 type='UInt32LE' buffer='fast'                                                                                                 -0.32 %       ±0.91%  ±1.22%  ±1.59%
buffers/buffer-read.js n=1000000 type='UInt8' buffer='fast'                                                                                                     0.88 %       ±3.73%  ±5.01%  ±6.62%
buffers/buffer-slice.js n=1000000 type='fast'                                                                                                                  -5.05 %       ±5.47%  ±7.37%  ±9.79%
buffers/buffer-slice.js n=1000000 type='slow'                                                                                                                   1.11 %       ±6.99%  ±9.31% ±12.12%
buffers/buffer-slice.js n=1000000 type='subarray'                                                                                                               3.96 %       ±7.25%  ±9.68% ±12.68%
buffers/buffer-swap.js n=1000000 len=1024 method='swap16' aligned='false'                                                                                       0.24 %       ±0.61%  ±0.81%  ±1.07%
buffers/buffer-swap.js n=1000000 len=1024 method='swap16' aligned='true'                                                                                        0.10 %       ±1.95%  ±2.60%  ±3.38%
buffers/buffer-swap.js n=1000000 len=1024 method='swap32' aligned='false'                                                                                      -0.18 %       ±0.34%  ±0.45%  ±0.58%
buffers/buffer-swap.js n=1000000 len=1024 method='swap32' aligned='true'                                                                                       -0.05 %       ±0.20%  ±0.26%  ±0.34%
buffers/buffer-swap.js n=1000000 len=1024 method='swap64' aligned='false'                                                                                       0.13 %       ±0.33%  ±0.44%  ±0.58%
buffers/buffer-swap.js n=1000000 len=1024 method='swap64' aligned='true'                                                                                        0.29 %       ±0.48%  ±0.64%  ±0.84%
buffers/buffer-swap.js n=1000000 len=2056 method='swap16' aligned='false'                                                                                       0.08 %       ±0.35%  ±0.46%  ±0.60%
buffers/buffer-swap.js n=1000000 len=2056 method='swap16' aligned='true'                                                                                        0.41 %       ±0.48%  ±0.65%  ±0.86%
buffers/buffer-swap.js n=1000000 len=2056 method='swap32' aligned='false'                                                                                      -0.02 %       ±0.20%  ±0.27%  ±0.35%
buffers/buffer-swap.js n=1000000 len=2056 method='swap32' aligned='true'                                                                                        0.15 %       ±0.22%  ±0.30%  ±0.39%
buffers/buffer-swap.js n=1000000 len=2056 method='swap64' aligned='false'                                                                                *     -0.35 %       ±0.35%  ±0.47%  ±0.61%
buffers/buffer-swap.js n=1000000 len=2056 method='swap64' aligned='true'                                                                                        0.14 %       ±0.24%  ±0.32%  ±0.42%
buffers/buffer-swap.js n=1000000 len=256 method='swap16' aligned='false'                                                                                       -0.57 %       ±6.75%  ±8.99% ±11.71%
buffers/buffer-swap.js n=1000000 len=256 method='swap16' aligned='true'                                                                                         1.51 %       ±9.42% ±12.54% ±16.35%
buffers/buffer-swap.js n=1000000 len=256 method='swap32' aligned='false'                                                                                       -0.51 %       ±3.49%  ±4.65%  ±6.05%
buffers/buffer-swap.js n=1000000 len=256 method='swap32' aligned='true'                                                                                         0.10 %       ±2.97%  ±3.95%  ±5.14%
buffers/buffer-swap.js n=1000000 len=256 method='swap64' aligned='false'                                                                                       -1.35 %       ±4.81%  ±6.40%  ±8.34%
buffers/buffer-swap.js n=1000000 len=256 method='swap64' aligned='true'                                                                                        -0.66 %       ±5.42%  ±7.22%  ±9.39%
buffers/buffer-swap.js n=1000000 len=64 method='swap16' aligned='false'                                                                                        -1.91 %       ±3.38%  ±4.52%  ±5.92%
buffers/buffer-swap.js n=1000000 len=64 method='swap16' aligned='true'                                                                                         -0.98 %       ±7.28%  ±9.70% ±12.63%
buffers/buffer-swap.js n=1000000 len=64 method='swap32' aligned='false'                                                                                        -2.28 %       ±6.46%  ±8.60% ±11.20%
buffers/buffer-swap.js n=1000000 len=64 method='swap32' aligned='true'                                                                                         -1.36 %       ±5.94%  ±7.91% ±10.31%
buffers/buffer-swap.js n=1000000 len=64 method='swap64' aligned='false'                                                                                        -2.87 %       ±6.02%  ±8.02% ±10.45%
buffers/buffer-swap.js n=1000000 len=64 method='swap64' aligned='true'                                                                                         -2.79 %       ±6.96%  ±9.26% ±12.05%
buffers/buffer-swap.js n=1000000 len=768 method='swap16' aligned='false'                                                                                       -0.17 %       ±0.59%  ±0.78%  ±1.02%
buffers/buffer-swap.js n=1000000 len=768 method='swap16' aligned='true'                                                                                        -1.43 %       ±3.41%  ±4.54%  ±5.91%
buffers/buffer-swap.js n=1000000 len=768 method='swap32' aligned='false'                                                                                       -0.30 %       ±0.30%  ±0.40%  ±0.52%
buffers/buffer-swap.js n=1000000 len=768 method='swap32' aligned='true'                                                                                        -0.24 %       ±0.49%  ±0.65%  ±0.86%
buffers/buffer-swap.js n=1000000 len=768 method='swap64' aligned='false'                                                                                        0.68 %       ±1.42%  ±1.89%  ±2.46%
buffers/buffer-swap.js n=1000000 len=768 method='swap64' aligned='true'                                                                                         0.02 %       ±0.59%  ±0.78%  ±1.02%
buffers/buffer-swap.js n=1000000 len=8192 method='swap16' aligned='false'                                                                                       0.08 %       ±0.24%  ±0.33%  ±0.43%
buffers/buffer-swap.js n=1000000 len=8192 method='swap16' aligned='true'                                                                                        0.00 %       ±0.13%  ±0.18%  ±0.23%
buffers/buffer-swap.js n=1000000 len=8192 method='swap32' aligned='false'                                                                                      -0.07 %       ±0.10%  ±0.14%  ±0.18%
buffers/buffer-swap.js n=1000000 len=8192 method='swap32' aligned='true'                                                                                        0.02 %       ±0.11%  ±0.14%  ±0.19%
buffers/buffer-swap.js n=1000000 len=8192 method='swap64' aligned='false'                                                                                      -0.08 %       ±0.19%  ±0.25%  ±0.33%
buffers/buffer-swap.js n=1000000 len=8192 method='swap64' aligned='true'                                                                                        0.06 %       ±0.15%  ±0.20%  ±0.25%
buffers/buffer-tojson.js len=0 n=10000                                                                                                                         -1.18 %       ±3.56%  ±4.74%  ±6.17%
buffers/buffer-tojson.js len=256 n=10000                                                                                                                       -0.27 %       ±1.23%  ±1.64%  ±2.13%
buffers/buffer-tojson.js len=4096 n=10000                                                                                                                      -1.89 %       ±3.65%  ±4.90%  ±6.48%
buffers/buffer-tostring.js n=1000000 len=1 args=0 encoding=''                                                                                                   3.00 %       ±9.18% ±12.21% ±15.89%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='ascii'                                                                                             -0.38 %       ±5.88%  ±7.82% ±10.18%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='hex'                                                                                               -4.63 %       ±7.11%  ±9.47% ±12.34%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='latin1'                                                                                             3.73 %       ±8.24% ±10.96% ±14.27%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='UCS-2'                                                                                              1.40 %       ±6.60%  ±8.78% ±11.43%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='utf8'                                                                                              -3.15 %       ±9.08% ±12.09% ±15.73%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='ascii'                                                                                             -0.82 %       ±6.66%  ±8.86% ±11.53%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='hex'                                                                                                1.81 %       ±7.19%  ±9.56% ±12.45%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='latin1'                                                                                            -3.15 %       ±8.00% ±10.64% ±13.86%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='UCS-2'                                                                                              1.46 %       ±6.30%  ±8.38% ±10.91%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='utf8'                                                                                              -6.20 %       ±6.31%  ±8.41% ±10.96%
buffers/buffer-tostring.js n=1000000 len=1024 args=0 encoding=''                                                                                                3.80 %       ±4.59%  ±6.11%  ±7.95%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='ascii'                                                                                           0.60 %       ±3.82%  ±5.08%  ±6.61%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='hex'                                                                                             0.25 %       ±0.66%  ±0.87%  ±1.14%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='latin1'                                                                                         -1.69 %       ±3.66%  ±4.87%  ±6.34%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='UCS-2'                                                                                          -0.30 %       ±3.60%  ±4.79%  ±6.24%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='utf8'                                                                                           -0.71 %       ±3.69%  ±4.91%  ±6.39%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='ascii'                                                                                           2.53 %       ±3.86%  ±5.14%  ±6.70%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='hex'                                                                                             0.05 %       ±0.81%  ±1.07%  ±1.40%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='latin1'                                                                                         -0.63 %       ±3.50%  ±4.66%  ±6.07%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='UCS-2'                                                                                           2.74 %       ±3.89%  ±5.18%  ±6.75%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='utf8'                                                                                            0.38 %       ±3.74%  ±4.97%  ±6.48%
buffers/buffer-tostring.js n=1000000 len=64 args=0 encoding=''                                                                                                  7.62 %       ±9.62% ±12.81% ±16.67%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='ascii'                                                                                            -3.84 %       ±6.10%  ±8.12% ±10.58%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='hex'                                                                                              -0.21 %       ±4.13%  ±5.50%  ±7.16%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='latin1'                                                                                           -1.28 %       ±6.93%  ±9.21% ±11.99%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='UCS-2'                                                                                            -0.68 %       ±5.78%  ±7.70% ±10.02%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='utf8'                                                                                             -2.81 %       ±6.59%  ±8.77% ±11.41%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='ascii'                                                                                             1.32 %       ±7.00%  ±9.31% ±12.12%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='hex'                                                                                        *      3.99 %       ±3.95%  ±5.26%  ±6.85%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='latin1'                                                                                           -0.30 %       ±6.70%  ±8.92% ±11.62%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='UCS-2'                                                                                            -4.11 %       ±4.68%  ±6.25%  ±8.17%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='utf8'                                                                                              6.57 %       ±6.57%  ±8.76% ±11.43%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding=''                                                                                          -0.86 %       ±4.80%  ±6.40%  ±8.33%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='ascii'                                                                                     -1.24 %       ±3.65%  ±4.86%  ±6.33%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='hex'                                                                                       -0.58 %       ±1.18%  ±1.57%  ±2.04%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='latin1'                                                                                    -3.21 %       ±6.02%  ±8.01% ±10.42%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='utf16le'                                                                                   -1.28 %       ±5.61%  ±7.47%  ±9.72%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='utf8'                                                                                      -0.97 %       ±3.99%  ±5.31%  ±6.91%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding=''                                                                                    -0.76 %       ±5.53%  ±7.35%  ±9.57%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='ascii'                                                                                0.65 %       ±6.55%  ±8.72% ±11.34%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='hex'                                                                                  0.23 %       ±2.77%  ±3.68%  ±4.79%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='latin1'                                                                              -6.65 %       ±6.87%  ±9.15% ±11.91%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='utf16le'                                                                              3.79 %       ±6.24%  ±8.30% ±10.80%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='utf8'                                                                                 2.24 %       ±4.00%  ±5.33%  ±6.94%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding=''                                                                              2.53 %       ±4.39%  ±5.84%  ±7.60%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='ascii'                                                                        -5.97 %       ±6.59%  ±8.77% ±11.42%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='hex'                                                                    *      1.50 %       ±1.40%  ±1.87%  ±2.43%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='latin1'                                                                 *     -6.02 %       ±5.36%  ±7.13%  ±9.28%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='utf16le'                                                                       0.80 %       ±5.30%  ±7.05%  ±9.18%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='utf8'                                                                          1.70 %       ±2.66%  ±3.55%  ±4.63%
buffers/buffer-write.js n=1000000 type='BigInt64BE' buffer='fast'                                                                                               3.28 %       ±8.07% ±10.74% ±13.99%
buffers/buffer-write.js n=1000000 type='BigInt64LE' buffer='fast'                                                                                              -2.96 %       ±7.04%  ±9.37% ±12.20%
buffers/buffer-write.js n=1000000 type='BigUInt64BE' buffer='fast'                                                                                             -0.58 %       ±5.55%  ±7.40%  ±9.64%
buffers/buffer-write.js n=1000000 type='BigUInt64LE' buffer='fast'                                                                                             -0.37 %       ±5.11%  ±6.80%  ±8.86%
buffers/buffer-write.js n=1000000 type='DoubleBE' buffer='fast'                                                                                                 4.18 %       ±6.78%  ±9.04% ±11.81%
buffers/buffer-write.js n=1000000 type='DoubleLE' buffer='fast'                                                                                                -5.04 %       ±7.62% ±10.15% ±13.21%
buffers/buffer-write.js n=1000000 type='FloatBE' buffer='fast'                                                                                                  2.64 %       ±7.63% ±10.16% ±13.23%
buffers/buffer-write.js n=1000000 type='FloatLE' buffer='fast'                                                                                                 -3.47 %       ±8.13% ±10.82% ±14.08%
buffers/buffer-write.js n=1000000 type='Int16BE' buffer='fast'                                                                                                  3.74 %       ±8.60% ±11.45% ±14.90%
buffers/buffer-write.js n=1000000 type='Int16LE' buffer='fast'                                                                                                 -0.60 %       ±7.93% ±10.56% ±13.74%
buffers/buffer-write.js n=1000000 type='Int32BE' buffer='fast'                                                                                                  5.00 %       ±8.41% ±11.19% ±14.56%
buffers/buffer-write.js n=1000000 type='Int32LE' buffer='fast'                                                                                                 -4.70 %       ±7.65% ±10.18% ±13.25%
buffers/buffer-write.js n=1000000 type='Int8' buffer='fast'                                                                                                    -0.20 %       ±9.59% ±12.76% ±16.61%
buffers/buffer-write.js n=1000000 type='IntBE' buffer='fast'                                                                                                    9.04 %      ±15.33% ±20.41% ±26.59%
buffers/buffer-write.js n=1000000 type='IntLE' buffer='fast'                                                                                                   -8.14 %      ±10.82% ±14.41% ±18.78%
buffers/buffer-write.js n=1000000 type='UInt16BE' buffer='fast'                                                                                                 0.20 %       ±8.80% ±11.71% ±15.24%
buffers/buffer-write.js n=1000000 type='UInt16LE' buffer='fast'                                                                                          *     -8.94 %       ±7.96% ±10.59% ±13.78%
buffers/buffer-write.js n=1000000 type='UInt32BE' buffer='fast'                                                                                                -1.89 %       ±7.77% ±10.34% ±13.46%
buffers/buffer-write.js n=1000000 type='UInt32LE' buffer='fast'                                                                                                -5.75 %       ±8.03% ±10.69% ±13.91%
buffers/buffer-write.js n=1000000 type='UInt8' buffer='fast'                                                                                             *     -8.90 %       ±8.01% ±10.65% ±13.87%
buffers/buffer-write.js n=1000000 type='UIntBE' buffer='fast'                                                                                                   4.93 %       ±8.55% ±11.38% ±14.82%
buffers/buffer-write.js n=1000000 type='UIntLE' buffer='fast'                                                                                                   5.94 %       ±9.16% ±12.18% ±15.85%
buffers/buffer-zero.js type='buffer' n=1000000                                                                                                                 -1.04 %       ±3.46%  ±4.64%  ±6.11%
buffers/buffer-zero.js type='string' n=1000000                                                                                                                  1.64 %       ±4.26%  ±5.73%  ±7.60%
buffers/dataview-set.js n=1000000 type='Float32BE'                                                                                                              1.52 %       ±2.96%  ±3.96%  ±5.21%
buffers/dataview-set.js n=1000000 type='Float32LE'                                                                                                             -0.08 %       ±0.64%  ±0.85%  ±1.11%
buffers/dataview-set.js n=1000000 type='Float64BE'                                                                                                              0.21 %       ±0.90%  ±1.21%  ±1.59%
buffers/dataview-set.js n=1000000 type='Float64LE'                                                                                                              0.73 %       ±1.17%  ±1.57%  ±2.08%
buffers/dataview-set.js n=1000000 type='Int16BE'                                                                                                                0.18 %       ±1.17%  ±1.55%  ±2.03%
buffers/dataview-set.js n=1000000 type='Int16LE'                                                                                                                2.71 %       ±4.03%  ±5.41%  ±7.15%
buffers/dataview-set.js n=1000000 type='Int32BE'                                                                                                                2.20 %       ±2.71%  ±3.63%  ±4.79%
buffers/dataview-set.js n=1000000 type='Int32LE'                                                                                                                0.49 %       ±1.28%  ±1.71%  ±2.23%
buffers/dataview-set.js n=1000000 type='Int8'                                                                                                                   0.82 %       ±1.29%  ±1.72%  ±2.24%
buffers/dataview-set.js n=1000000 type='Uint16BE'                                                                                                              -0.03 %       ±1.09%  ±1.45%  ±1.89%
buffers/dataview-set.js n=1000000 type='Uint16LE'                                                                                                              -0.23 %       ±1.31%  ±1.75%  ±2.27%
buffers/dataview-set.js n=1000000 type='Uint32BE'                                                                                                              -0.97 %       ±3.14%  ±4.23%  ±5.61%
buffers/dataview-set.js n=1000000 type='Uint32LE'                                                                                                              -0.41 %       ±0.65%  ±0.87%  ±1.13%
buffers/dataview-set.js n=1000000 type='Uint8'                                                                                                                  0.34 %       ±1.10%  ±1.46%  ±1.91%

Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case, there are 388 comparisons, you can thus
expect the following amount of false-positive results:
  19.40 false positives, when considering a   5% risk acceptance (*, **, ***),
  3.88 false positives, when considering a   1% risk acceptance (**, ***),
  0.39 false positives, when considering a 0.1% risk acceptance (***)

nodejs-github-bot · 2023-11-09T05:04:40Z

CI: https://ci.nodejs.org/job/node-test-pull-request/55509/

nodejs-github-bot · 2023-11-09T19:04:52Z

CI: https://ci.nodejs.org/job/node-test-pull-request/55528/

nodejs-github-bot · 2023-11-10T08:30:57Z

CI: https://ci.nodejs.org/job/node-test-pull-request/55530/

nodejs-github-bot · 2023-11-10T09:45:16Z

Landed in 89c66ae

PR-URL: #50621 Refs: #50620 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Debadree Chatterjee <debadree333@gmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com>

Improve performance of areSimilarFloatArrays by using primordial. Refs: nodejs#50621

Improve performance of areSimilarFloatArrays by using primordial. Refs: #50621 PR-URL: #51040 Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br> Reviewed-By: James M Snell <jasnell@gmail.com>

PR-URL: #50621 Refs: #50620 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Debadree Chatterjee <debadree333@gmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com>

Improve performance of areSimilarFloatArrays by using primordial. Refs: #50621 PR-URL: #51040 Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br> Reviewed-By: James M Snell <jasnell@gmail.com>

nodejs-github-bot added buffer Issues and PRs related to the buffer subsystem. needs-ci PRs that need a full CI run. labels Nov 8, 2023

RaisinTen added the request-ci Add this label to start a Jenkins CI on a PR. label Nov 8, 2023

github-actions bot removed the request-ci Add this label to start a Jenkins CI on a PR. label Nov 8, 2023

anonrig added the needs-benchmark-ci PR that need a benchmark CI run. label Nov 8, 2023

aduh95 approved these changes Nov 8, 2023

View reviewed changes

kylo5aby force-pushed the performance/buffer branch from 2aaa6d3 to 16e579f Compare November 8, 2023 14:12

aduh95 reviewed Nov 8, 2023

View reviewed changes

lib/buffer.js Show resolved Hide resolved

buffer: improve Buffer.equals performance

d61cb9c

kylo5aby force-pushed the performance/buffer branch from 16e579f to d61cb9c Compare November 8, 2023 14:44

H4ad linked an issue Nov 8, 2023 that may be closed by this pull request

Buffer.byteLength Performance Regression from v18.x to v22.x #50620

Closed

anonrig approved these changes Nov 8, 2023

View reviewed changes

github-actions bot mentioned this pull request Nov 9, 2023

CI Reliability 2023-11-09 nodejs/reliability#712

Open

20 tasks

debadree25 approved these changes Nov 9, 2023

View reviewed changes

debadree25 added author ready PRs that have at least one approval, no pending requests for changes, and a CI started. request-ci Add this label to start a Jenkins CI on a PR. labels Nov 9, 2023

github-actions bot removed the request-ci Add this label to start a Jenkins CI on a PR. label Nov 9, 2023

RaisinTen approved these changes Nov 9, 2023

View reviewed changes

github-actions bot mentioned this pull request Nov 10, 2023

CI Reliability 2023-11-10 nodejs/reliability#713

Open

18 tasks

debadree25 added the commit-queue Add this label to land a pull request using GitHub Actions. label Nov 10, 2023

nodejs-github-bot removed the commit-queue Add this label to land a pull request using GitHub Actions. label Nov 10, 2023

nodejs-github-bot merged commit 89c66ae into nodejs:main Nov 10, 2023

github-actions bot mentioned this pull request Nov 11, 2023

CI Reliability 2023-11-11 nodejs/reliability#714

Open

27 tasks

github-actions bot mentioned this pull request Nov 12, 2023

CI Reliability 2023-11-12 nodejs/reliability#715

Open

18 tasks

targos mentioned this pull request Nov 12, 2023

v21.2.0 release proposal #50681

Merged

This was referenced Nov 13, 2023

CI Reliability 2023-11-13 nodejs/reliability#716

Open

CI Reliability 2023-11-14 nodejs/reliability#717

Open

Septa2112 added a commit to Septa2112/node that referenced this pull request Dec 4, 2023

util: improve performance of function areSimilarFloatArrays

0e48964

Improve performance of areSimilarFloatArrays by using primordial. Refs: nodejs#50621

Septa2112 mentioned this pull request Dec 4, 2023

util: improve performance of function areSimilarFloatArrays #51040

Merged

UlisesGascon mentioned this pull request Dec 12, 2023

v20.11.0 proposal #51124

Merged

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Uh oh!

buffer: improve `Buffer.equals` performance #50621

buffer: improve `Buffer.equals` performance #50621

Uh oh!

kylo5aby commented Nov 8, 2023 •

edited

Loading

Uh oh!

nodejs-github-bot commented Nov 8, 2023

Uh oh!

aduh95 Nov 8, 2023

Uh oh!

kylo5aby Nov 8, 2023

Uh oh!

Uh oh!

aduh95 commented Nov 8, 2023 •

edited

Loading

Uh oh!

nodejs-github-bot commented Nov 9, 2023

Uh oh!

nodejs-github-bot commented Nov 9, 2023

Uh oh!

nodejs-github-bot commented Nov 10, 2023

Uh oh!

nodejs-github-bot commented Nov 10, 2023

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

6 participants

Uh oh!

buffer: improve Buffer.equals performance #50621

buffer: improve Buffer.equals performance #50621

Uh oh!

Conversation

kylo5aby commented Nov 8, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

nodejs-github-bot commented Nov 8, 2023

Uh oh!

aduh95 Nov 8, 2023

Choose a reason for hiding this comment

Uh oh!

kylo5aby Nov 8, 2023

Choose a reason for hiding this comment

Uh oh!

Uh oh!

aduh95 commented Nov 8, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

nodejs-github-bot commented Nov 9, 2023

Uh oh!

nodejs-github-bot commented Nov 9, 2023

Uh oh!

nodejs-github-bot commented Nov 10, 2023

Uh oh!

nodejs-github-bot commented Nov 10, 2023

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

6 participants

buffer: improve `Buffer.equals` performance #50621

buffer: improve `Buffer.equals` performance #50621

kylo5aby commented Nov 8, 2023 •

edited

Loading

aduh95 commented Nov 8, 2023 •

edited

Loading