tree 8e31f856afcf6bc9ec699f7e8af489b16439354e
parent 9b228fab2a8facc8f74100fe23be691486d40b97
author Nigel Tao <nigeltao@golang.org> 1617886316 +1000
committer Nigel Tao <nigeltao@golang.org> 1617890793 +1000

Add deflate.decoder.decode_huffman_bmi2

Binary size, before:
21864 gen/lib/c/clang-9-dynamic/wuffs-std-deflate.lo
21488 gen/lib/c/clang-9-static/wuffs-std-deflate.o
21136 gen/lib/c/gcc-dynamic/wuffs-std-deflate.lo
21536 gen/lib/c/gcc-static/wuffs-std-deflate.o

After:
24592 gen/lib/c/clang-9-dynamic/wuffs-std-deflate.lo
24368 gen/lib/c/clang-9-static/wuffs-std-deflate.o
23320 gen/lib/c/gcc-dynamic/wuffs-std-deflate.lo
23928 gen/lib/c/gcc-static/wuffs-std-deflate.o

I've upgraded my kernel and compilers recently, so the absolute Wuffs
benchmark numbers below aren't directly comparable to those reported in
previous commits, but the relative changes still seems valid.

On a mid-range x86_64 laptop:

name                                                      old speed      new speed      delta

wuffs_deflate_decode_1k_full_init/clang9                   107MB/s ± 1%   104MB/s ± 1%   -2.36%  (p=0.000 n=8+9)
wuffs_deflate_decode_1k_part_init/clang9                   123MB/s ± 1%   121MB/s ± 1%   -1.78%  (p=0.000 n=10+9)
wuffs_deflate_decode_10k_full_init/clang9                  221MB/s ± 2%   223MB/s ± 1%   +0.86%  (p=0.035 n=10+9)
wuffs_deflate_decode_10k_part_init/clang9                  228MB/s ± 0%   230MB/s ± 1%   +0.59%  (p=0.003 n=8+10)
wuffs_deflate_decode_100k_just_one_read/clang9             276MB/s ± 0%   279MB/s ± 1%   +1.12%  (p=0.001 n=8+9)
wuffs_deflate_decode_100k_many_big_reads/clang9            174MB/s ± 1%   178MB/s ± 5%   +2.38%  (p=0.028 n=9+10)

wuffs_deflate_decode_1k_full_init/gcc10                    103MB/s ± 3%   103MB/s ± 1%     ~     (p=0.105 n=10+10)
wuffs_deflate_decode_1k_part_init/gcc10                    123MB/s ± 1%   122MB/s ± 1%   -0.94%  (p=0.001 n=9+10)
wuffs_deflate_decode_10k_full_init/gcc10                   216MB/s ± 2%   235MB/s ± 1%   +8.83%  (p=0.000 n=10+10)
wuffs_deflate_decode_10k_part_init/gcc10                   223MB/s ± 1%   242MB/s ± 1%   +8.45%  (p=0.000 n=9+9)
wuffs_deflate_decode_100k_just_one_read/gcc10              270MB/s ± 4%   300MB/s ± 4%  +11.08%  (p=0.000 n=9+10)
wuffs_deflate_decode_100k_many_big_reads/gcc10             179MB/s ± 1%   193MB/s ± 2%   +7.97%  (p=0.000 n=10+10)

wuffs_gzip_decode_10k/clang9                               218MB/s ± 3%   220MB/s ± 1%     ~     (p=0.549 n=10+9)
wuffs_gzip_decode_100k/clang9                              270MB/s ± 0%   269MB/s ± 2%     ~     (p=0.730 n=9+9)

wuffs_gzip_decode_10k/gcc10                                208MB/s ± 1%   227MB/s ± 1%   +8.87%  (p=0.000 n=9+10)
wuffs_gzip_decode_100k/gcc10                               267MB/s ± 1%   283MB/s ± 1%   +6.05%  (p=0.000 n=10+9)

wuffs_zlib_decode_10k/clang9                               214MB/s ± 2%   226MB/s ± 1%   +5.69%  (p=0.000 n=10+9)
wuffs_zlib_decode_100k/clang9                              259MB/s ± 6%   272MB/s ± 2%   +5.05%  (p=0.000 n=9+10)

wuffs_zlib_decode_10k/gcc10                                211MB/s ± 1%   227MB/s ± 1%   +7.53%  (p=0.000 n=10+10)
wuffs_zlib_decode_100k/gcc10                               262MB/s ± 1%   282MB/s ± 1%   +7.69%  (p=0.000 n=10+9)

wuffs_png_decode_image_19k_8bpp/clang9                     144MB/s ± 0%   148MB/s ± 1%   +2.68%  (p=0.000 n=9+9)
wuffs_png_decode_image_40k_24bpp/clang9                    166MB/s ± 1%   170MB/s ± 1%   +2.38%  (p=0.000 n=9+9)
wuffs_png_decode_image_77k_8bpp/clang9                     515MB/s ± 1%   525MB/s ± 1%   +1.91%  (p=0.000 n=9+8)
wuffs_png_decode_image_552k_32bpp_ignore_checksum/clang9   401MB/s ± 1%   400MB/s ± 2%     ~     (p=0.913 n=9+9)
wuffs_png_decode_image_552k_32bpp_verify_checksum/clang9   387MB/s ± 1%   388MB/s ± 1%     ~     (p=0.546 n=9+9)
wuffs_png_decode_image_4002k_24bpp/clang9                  170MB/s ± 3%   175MB/s ± 1%   +3.02%  (p=0.000 n=9+10)

wuffs_png_decode_image_19k_8bpp/gcc10                      143MB/s ± 2%   154MB/s ± 3%   +8.32%  (p=0.000 n=9+9)
wuffs_png_decode_image_40k_24bpp/gcc10                     174MB/s ± 2%   182MB/s ± 1%   +4.42%  (p=0.000 n=10+9)
wuffs_png_decode_image_77k_8bpp/gcc10                      513MB/s ± 2%   552MB/s ± 3%   +7.66%  (p=0.000 n=10+9)
wuffs_png_decode_image_552k_32bpp_ignore_checksum/gcc10    408MB/s ± 1%   426MB/s ± 2%   +4.43%  (p=0.000 n=9+10)
wuffs_png_decode_image_552k_32bpp_verify_checksum/gcc10    390MB/s ± 4%   410MB/s ± 2%   +5.05%  (p=0.000 n=10+9)
wuffs_png_decode_image_4002k_24bpp/gcc10                   177MB/s ± 1%   186MB/s ± 1%   +5.13%  (p=0.000 n=9+9)