bfa8b6f8ff
Use LDP instructions to load 16 bytes per loop when the source length is long. Specially process the 8 bytes length, 4 bytes length and 2 bytes length to get a better performance. Benchmark result: name old time/op new time/op delta BytesCompare/1-8 21.0ns ± 0% 10.5ns ± 0% ~ (p=0.079 n=4+5) BytesCompare/2-8 11.5ns ± 0% 10.5ns ± 0% -8.70% (p=0.008 n=5+5) BytesCompare/4-8 13.5ns ± 0% 10.0ns ± 0% -25.93% (p=0.008 n=5+5) BytesCompare/8-8 28.8ns ± 0% 9.5ns ± 0% ~ (p=0.079 n=4+5) BytesCompare/16-8 40.5ns ± 0% 10.5ns ± 0% -74.07% (p=0.008 n=5+5) BytesCompare/32-8 64.6ns ± 0% 12.5ns ± 0% -80.65% (p=0.008 n=5+5) BytesCompare/64-8 112ns ± 0% 16ns ± 0% -85.27% (p=0.008 n=5+5) BytesCompare/128-8 208ns ± 0% 24ns ± 0% -88.22% (p=0.008 n=5+5) BytesCompare/256-8 400ns ± 0% 50ns ± 0% -87.62% (p=0.008 n=5+5) BytesCompare/512-8 785ns ± 0% 82ns ± 0% -89.61% (p=0.008 n=5+5) BytesCompare/1024-8 1.55µs ± 0% 0.14µs ± 0% ~ (p=0.079 n=4+5) BytesCompare/2048-8 3.09µs ± 0% 0.27µs ± 0% ~ (p=0.079 n=4+5) CompareBytesEqual-8 39.0ns ± 0% 12.0ns ± 0% -69.23% (p=0.008 n=5+5) CompareBytesToNil-8 8.57ns ± 5% 8.23ns ± 2% -3.99% (p=0.016 n=5+5) CompareBytesEmpty-8 7.37ns ± 0% 7.36ns ± 4% ~ (p=0.690 n=5+5) CompareBytesIdentical-8 7.39ns ± 0% 7.46ns ± 2% ~ (p=0.667 n=5+5) CompareBytesSameLength-8 17.0ns ± 0% 10.5ns ± 0% -38.24% (p=0.008 n=5+5) CompareBytesDifferentLength-8 17.0ns ± 0% 10.5ns ± 0% -38.24% (p=0.008 n=5+5) CompareBytesBigUnaligned-8 1.58ms ± 0% 0.19ms ± 0% -88.31% (p=0.016 n=4+5) CompareBytesBig-8 1.59ms ± 0% 0.19ms ± 0% -88.27% (p=0.016 n=5+4) CompareBytesBigIdentical-8 7.01ns ± 0% 6.60ns ± 3% -5.91% (p=0.008 n=5+5) name old speed new speed delta CompareBytesBigUnaligned-8 662MB/s ± 0% 5660MB/s ± 0% +755.15% (p=0.016 n=4+5) CompareBytesBig-8 661MB/s ± 0% 5636MB/s ± 0% +752.57% (p=0.016 n=5+4) CompareBytesBigIdentical-8 150TB/s ± 0% 159TB/s ± 3% +6.27% (p=0.008 n=5+5) Change-Id: I70332de06f873df3bc12c4a5af1028307b670046 Reviewed-on: https://go-review.googlesource.com/90175 Reviewed-by: Cherry Zhang <cherryyz@google.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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