7f99845359
This change uses library functions such as bits.RotateLeft32 to reduce the amount of code needed in the generic implementation. Since the code is now shorter I've also removed the option to generate a non-unrolled version of the code. I've also tried to remove bounds checks where possible to make the new version performant, however that is not the primary goal of this change since most architectures have assembly implementations already. Assembly performance: name old speed new speed delta Hash8Bytes 50.3MB/s ± 1% 59.1MB/s ± 0% +17.63% (p=0.000 n=9+8) Hash1K 590MB/s ± 0% 597MB/s ± 0% +1.25% (p=0.000 n=9+9) Hash8K 636MB/s ± 1% 638MB/s ± 1% ~ (p=0.072 n=10+10) Hash8BytesUnaligned 50.5MB/s ± 0% 59.1MB/s ± 1% +17.09% (p=0.000 n=10+10) Hash1KUnaligned 589MB/s ± 1% 596MB/s ± 1% +1.23% (p=0.000 n=9+10) Hash8KUnaligned 638MB/s ± 1% 640MB/s ± 0% +0.35% (p=0.002 n=10+10) Pure Go performance: name old speed new speed delta Hash8Bytes 30.3MB/s ± 1% 42.8MB/s ± 0% +41.20% (p=0.000 n=9+9) Hash1K 364MB/s ± 4% 394MB/s ± 1% +8.27% (p=0.000 n=10+10) Hash8K 404MB/s ± 1% 420MB/s ± 0% +4.17% (p=0.000 n=10+9) Hash8BytesUnaligned 30.3MB/s ± 1% 42.8MB/s ± 1% +40.92% (p=0.000 n=9+10) Hash1KUnaligned 368MB/s ± 0% 394MB/s ± 0% +7.07% (p=0.000 n=9+9) Hash8KUnaligned 404MB/s ± 1% 411MB/s ± 3% +1.91% (p=0.026 n=9+10) Change-Id: I9a91fb52ea8d62964d5351bdf121e9fbc9282852 Reviewed-on: https://go-review.googlesource.com/c/137355 Run-TryBot: Michael Munday <mike.munday@ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> |
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