tree ba9b9be4ad5a6b25e4c07515507555da8669b689
parent e541e0cf79c718551ec42ce4f8f3d963e22412ad
author Nigel Tao <nigeltao@golang.org> 1713876655 +1000
committer Nigel Tao <nigeltao@golang.org> 1713877830 +1000

std/crc32: re-write x86_sse42 implementation

name                                                       old speed      new speed      delta

wuffs_crc32_ieee_10k/clang14                               13.5GB/s ± 0%  21.9GB/s ± 0%  +62.09%  (p=0.016 n=5+4)
wuffs_crc32_ieee_100k/clang14                              22.4GB/s ± 9%  29.7GB/s ± 0%  +32.76%  (p=0.016 n=5+4)

wuffs_crc32_ieee_10k/gcc12                                 14.2GB/s ± 2%  22.2GB/s ± 0%  +56.92%  (p=0.008 n=5+5)
wuffs_crc32_ieee_100k/gcc12                                21.3GB/s ± 3%  29.6GB/s ± 1%  +39.18%  (p=0.008 n=5+5)

wuffs_gzip_decode_10k/clang14                               366MB/s ± 0%   372MB/s ± 0%   +1.41%  (p=0.008 n=5+5)
wuffs_gzip_decode_100k/clang14                              482MB/s ± 0%   494MB/s ± 0%   +2.57%  (p=0.008 n=5+5)

wuffs_gzip_decode_10k/gcc12                                 398MB/s ± 0%   418MB/s ± 0%   +5.19%  (p=0.008 n=5+5)
wuffs_gzip_decode_100k/gcc12                                510MB/s ± 0%   537MB/s ± 0%   +5.21%  (p=0.008 n=5+5)

wuffs_png_decode_image_19k_8bpp/clang14                     263MB/s ± 0%   264MB/s ± 0%   +0.39%  (p=0.008 n=5+5)
wuffs_png_decode_image_40k_24bpp/clang14                    297MB/s ± 0%   298MB/s ± 0%   +0.16%  (p=0.008 n=5+5)
wuffs_png_decode_image_77k_8bpp/clang14                     932MB/s ± 0%   945MB/s ± 0%   +1.33%  (p=0.008 n=5+5)
wuffs_png_decode_image_552k_32bpp_ignore_checksum/clang14   831MB/s ± 0%   833MB/s ± 0%   +0.25%  (p=0.008 n=5+5)
wuffs_png_decode_image_552k_32bpp_verify_checksum/clang14   799MB/s ± 0%   802MB/s ± 0%   +0.37%  (p=0.008 n=5+5)
wuffs_png_decode_image_4002k_24bpp/clang14                  306MB/s ± 0%   307MB/s ± 0%   +0.56%  (p=0.008 n=5+5)

wuffs_png_decode_image_19k_8bpp/gcc12                       283MB/s ± 0%   270MB/s ± 0%   -4.84%  (p=0.008 n=5+5)
wuffs_png_decode_image_40k_24bpp/gcc12                      330MB/s ± 0%   329MB/s ± 0%   -0.29%  (p=0.016 n=5+4)
wuffs_png_decode_image_77k_8bpp/gcc12                       992MB/s ± 0%   957MB/s ± 0%   -3.56%  (p=0.008 n=5+5)
wuffs_png_decode_image_552k_32bpp_ignore_checksum/gcc12     920MB/s ± 0%   908MB/s ± 0%   -1.30%  (p=0.008 n=5+5)
wuffs_png_decode_image_552k_32bpp_verify_checksum/gcc12     875MB/s ± 0%   867MB/s ± 0%   -0.95%  (p=0.008 n=5+5)
wuffs_png_decode_image_4002k_24bpp/gcc12                    341MB/s ± 0%   342MB/s ± 0%   +0.25%  (p=0.008 n=5+5)