tree 131812ce11587cda3ddcbbee05cda06032ffbf68
parent 8ccaf81e965c287dd36930af7d681052eb4f24f2
author Nigel Tao <nigeltao@golang.org> 1619531671 +1000
committer Nigel Tao <nigeltao@golang.org> 1619533100 +1000

Add std/adler32 hasher.up_x86_avx2

While the std/adler32 benchmarks got better, the std/zlib and std/png
benchmarks got worse.

This commit will soon be followed by a rollback, but it is committed
anyway so that we can refer to these numbers in the git log.

Binary size, before:
4056 gen/lib/c/clang-9-dynamic/wuffs-std-adler32.lo
4104 gen/lib/c/clang-9-static/wuffs-std-adler32.o
4624 gen/lib/c/gcc-dynamic/wuffs-std-adler32.lo
4680 gen/lib/c/gcc-static/wuffs-std-adler32.o

After:
4952 gen/lib/c/clang-9-dynamic/wuffs-std-adler32.lo
5016 gen/lib/c/clang-9-static/wuffs-std-adler32.o
5512 gen/lib/c/gcc-dynamic/wuffs-std-adler32.lo
5576 gen/lib/c/gcc-static/wuffs-std-adler32.o

name                                                      old speed      new speed      delta

wuffs_adler32_10k/clang9                                  11.5GB/s ± 1%  15.0GB/s ± 5%  +30.73%  (p=0.000 n=9+10)
wuffs_adler32_100k/clang9                                 13.5GB/s ± 1%  15.6GB/s ±14%  +16.06%  (p=0.001 n=9+10)

wuffs_adler32_10k/gcc10                                   11.3GB/s ± 2%  15.6GB/s ± 1%  +38.27%  (p=0.000 n=9+9)
wuffs_adler32_100k/gcc10                                  11.3GB/s ± 1%  19.4GB/s ± 1%  +71.20%  (p=0.000 n=7+9)

wuffs_zlib_decode_10k/clang9                               223MB/s ± 1%   216MB/s ± 2%   -3.45%  (p=0.000 n=10+10)
wuffs_zlib_decode_100k/clang9                              285MB/s ± 1%   284MB/s ± 1%     ~     (p=0.243 n=9+10)

wuffs_zlib_decode_10k/gcc10                                232MB/s ± 1%   216MB/s ± 1%   -6.70%  (p=0.000 n=10+9)
wuffs_zlib_decode_100k/gcc10                               291MB/s ± 1%   280MB/s ± 1%   -3.70%  (p=0.000 n=9+8)

wuffs_png_decode_image_19k_8bpp/clang9                     152MB/s ± 1%   143MB/s ± 3%   -5.89%  (p=0.000 n=8+9)
wuffs_png_decode_image_40k_24bpp/clang9                    171MB/s ± 1%   173MB/s ± 1%     ~     (p=0.094 n=9+9)
wuffs_png_decode_image_77k_8bpp/clang9                     541MB/s ± 1%   509MB/s ± 1%   -5.77%  (p=0.000 n=8+9)
wuffs_png_decode_image_552k_32bpp_ignore_checksum/clang9   479MB/s ± 1%   464MB/s ± 3%   -3.20%  (p=0.000 n=8+10)
wuffs_png_decode_image_552k_32bpp_verify_checksum/clang9   461MB/s ± 1%   452MB/s ± 1%   -2.02%  (p=0.000 n=8+10)
wuffs_png_decode_image_4002k_24bpp/clang9                  177MB/s ± 1%   175MB/s ± 2%   -1.14%  (p=0.004 n=10+10)

wuffs_png_decode_image_19k_8bpp/gcc10                      159MB/s ± 1%   153MB/s ± 1%   -3.54%  (p=0.000 n=8+10)
wuffs_png_decode_image_40k_24bpp/gcc10                     188MB/s ± 1%   187MB/s ± 1%   -0.47%  (p=0.021 n=10+9)
wuffs_png_decode_image_77k_8bpp/gcc10                      557MB/s ± 0%   546MB/s ± 4%   -1.94%  (p=0.000 n=8+10)
wuffs_png_decode_image_552k_32bpp_ignore_checksum/gcc10    510MB/s ± 0%   493MB/s ± 0%   -3.33%  (p=0.000 n=10+9)
wuffs_png_decode_image_552k_32bpp_verify_checksum/gcc10    486MB/s ± 1%   478MB/s ± 0%   -1.77%  (p=0.000 n=8+9)
wuffs_png_decode_image_4002k_24bpp/gcc10                   189MB/s ± 1%   187MB/s ± 1%   -1.26%  (p=0.000 n=10+10)