tree ef9bab4b999ef8dd7933ad94ff52005692e4846a
parent e1f803324b0aa2113bcca7418ab1a4ea53f2b7b5
author Nigel Tao <nigeltao@golang.org> 1713758043 +1000
committer Nigel Tao <nigeltao@golang.org> 1713758716 +1000

std/crc64: re-write x86_sse42 implementation

name                           old speed      new speed       delta

wuffs_crc64_ecma_10k/clang14   5.84GB/s ± 0%  23.43GB/s ± 0%  +301.23%  (p=0.008 n=5+5)
wuffs_crc64_ecma_100k/clang14  6.18GB/s ± 0%  30.23GB/s ± 1%  +389.45%  (p=0.008 n=5+5)

wuffs_crc64_ecma_10k/gcc12     5.87GB/s ± 1%  24.02GB/s ± 0%  +309.21%  (p=0.008 n=5+5)
wuffs_crc64_ecma_100k/gcc12    6.21GB/s ± 0%  30.68GB/s ± 0%  +394.22%  (p=0.008 n=5+5)

$ time example-mzcat < linux-6.8.2.tar.xz > /dev/null
Before: user 0m7.604s
After:  user 0m7.432s