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Hello! I was pretty excited to see the alpha release because of all the hype regarding Canon's method but either I did something wrong or, ..., well 🤷
The first bench is from dba696e on Feb 15 and then the alpha release.
The command used was
rustup run nightly cargo criterion --bench uniform --features small_rngsamplei32
| Alpha | Rng | single |
distr |
|---|---|---|---|
SmallRng |
3.30 ns (✅ 1.00x) |
2.01 ns (✅ 1.00x) |
|
| => | SmallRng |
3.31 ns (✅ 1.00x) |
2.07 ns (✅ 1.00x) |
ChaCha8Rng |
3.59 ns (✅ 1.09x slower) |
2.48 ns (❌ 1.23x slower) |
|
| => | ChaCha8Rng |
3.62 ns (✅ 1.09x slower) |
2.66 ns (❌ 1.29x slower) |
Pcg32 |
2.85 ns (✅ 1.16x faster) |
2.25 ns (❌ 1.12x slower) |
|
| => | Pcg32 |
2.93 ns (✅ 1.13x faster) |
2.28 ns (✅ 1.10x slower) |
Pcg64 |
3.88 ns (❌ 1.18x slower) |
2.66 ns (❌ 1.32x slower) |
|
| => | Pcg64 |
3.86 ns (❌ 1.17x slower) |
2.72 ns (❌ 1.32x slower) |
samplei64
| Alpha | Rng | single |
distr |
|---|---|---|---|
SmallRng |
4.63 ns (✅ 1.00x) |
1.90 ns (✅ 1.00x) |
|
| => | SmallRng |
4.58 ns (✅ 1.00x) |
1.91 ns (✅ 1.00x) |
ChaCha8Rng |
5.97 ns (❌ 1.29x slower) |
3.60 ns (❌ 1.89x slower) |
|
| => | ChaCha8Rng |
5.90 ns (❌ 1.29x slower) |
3.63 ns (❌ 1.90x slower) |
Pcg32 |
5.29 ns (❌ 1.14x slower) |
3.12 ns (❌ 1.64x slower) |
|
| => | Pcg32 |
5.25 ns (❌ 1.15x slower) |
3.12 ns (❌ 1.63x slower) |
Pcg64 |
5.00 ns (✅ 1.08x slower) |
2.68 ns (❌ 1.40x slower) |
|
| => | Pcg64 |
5.05 ns (✅ 1.10x slower) |
2.70 ns (❌ 1.41x slower) |
As you can see, no gains. At least things didn't get worse. I also tested with feature unbiased and I didn't see anything change but if I understand correctly that shouldn't alter single samples.
So did I miss something?
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