64d323f45a
The existing code makes copies of every byte it hashes. When passed a large chunk of memory, Write and WriteString can skip the copying and initSeed for most of it. To ensure that Write, WriteByte, and WriteString continue to generate output that depends only on the sequence of bytes, expand the grouping test to include WriteString and interleaved calls. Also, make the test process a lot more data, to ensure that Write* handled full buffers correctly. name old time/op new time/op delta Hash8Bytes-8 17.1ns ± 3% 16.5ns ± 2% -3.26% (p=0.000 n=29+27) Hash320Bytes-8 74.9ns ± 2% 58.5ns ± 2% -21.86% (p=0.000 n=30+29) Hash1K-8 246ns ± 3% 195ns ± 1% -20.82% (p=0.000 n=29+30) Hash8K-8 1.87µs ± 2% 1.59µs ± 2% -15.04% (p=0.000 n=26+30) name old speed new speed delta Hash8Bytes-8 468MB/s ± 3% 484MB/s ± 2% +3.36% (p=0.000 n=29+27) Hash320Bytes-8 4.28GB/s ± 2% 5.47GB/s ± 2% +27.97% (p=0.000 n=30+29) Hash1K-8 4.17GB/s ± 3% 5.26GB/s ± 1% +26.28% (p=0.000 n=29+30) Hash8K-8 4.38GB/s ± 2% 5.16GB/s ± 2% +17.70% (p=0.000 n=26+30) Updates #42710 Change-Id: If3cdec1580ffb3e36fab9865e5a9d089c0a34bec Reviewed-on: https://go-review.googlesource.com/c/go/+/278758 Trust: Josh Bleecher Snyder <josharian@gmail.com> Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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README.md
The Go Programming Language
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