tree 307b00fc8da77667b7f697678ae0aef26f8d095b
parent 85be5b9f8a29680fff9398e55a8ec93efac33b02
author Nigel Tao <nigeltao@golang.org> 1549167953 +1100
committer Nigel Tao <nigeltao@golang.org> 1549167953 +1100

Roll back 3 recent lzw.decoder.suffixes commits

Specifically:
49627b4 Flatten the lzw.decoder.suffixes array
f877fb2 Use the workbuf instead of lzw.decoder.suffixes
85be5b9 Delete the obsolete lzw.decoder.suffixes array

name                                     old speed      new speed      delta

wuffs_lzw_decode_20k/clang5               247MB/s ± 0%   265MB/s ± 0%   +7.31%  (p=0.008 n=5+5)
wuffs_lzw_decode_100k/clang5              407MB/s ± 0%   452MB/s ± 1%  +11.21%  (p=0.008 n=5+5)

wuffs_lzw_decode_20k/gcc7                 238MB/s ± 1%   263MB/s ± 1%  +10.81%  (p=0.008 n=5+5)
wuffs_lzw_decode_100k/gcc7                384MB/s ± 0%   482MB/s ± 2%  +25.54%  (p=0.008 n=5+5)

wuffs_gif_decode_1k_bw/clang5             318MB/s ± 0%   241MB/s ± 1%  -24.15%  (p=0.008 n=5+5)
wuffs_gif_decode_1k_color/clang5          154MB/s ± 0%   141MB/s ± 1%   -8.58%  (p=0.008 n=5+5)
wuffs_gif_decode_10k_bgra/clang5          697MB/s ± 1%   721MB/s ± 0%   +3.53%  (p=0.008 n=5+5)
wuffs_gif_decode_10k_indexed/clang5       186MB/s ± 0%   194MB/s ± 1%   +4.20%  (p=0.008 n=5+5)
wuffs_gif_decode_20k/clang5               226MB/s ± 1%   246MB/s ± 1%   +8.85%  (p=0.008 n=5+5)
wuffs_gif_decode_100k_artificial/clang5   508MB/s ± 1%   551MB/s ± 0%   +8.33%  (p=0.008 n=5+5)
wuffs_gif_decode_100k_realistic/clang5    203MB/s ± 0%   227MB/s ± 0%  +11.88%  (p=0.008 n=5+5)
wuffs_gif_decode_1000k/clang5             206MB/s ± 0%   231MB/s ± 0%  +12.46%  (p=0.008 n=5+5)
wuffs_gif_decode_anim_screencap/clang5   1.03GB/s ± 0%  1.10GB/s ± 0%   +5.85%  (p=0.008 n=5+5)

wuffs_gif_decode_1k_bw/gcc7               398MB/s ± 0%   265MB/s ± 1%  -33.35%  (p=0.008 n=5+5)
wuffs_gif_decode_1k_color/gcc7            161MB/s ± 0%   145MB/s ± 1%   -9.74%  (p=0.008 n=5+5)
wuffs_gif_decode_10k_bgra/gcc7            604MB/s ± 1%   622MB/s ± 1%   +2.94%  (p=0.008 n=5+5)
wuffs_gif_decode_10k_indexed/gcc7         187MB/s ± 1%   194MB/s ± 0%   +3.83%  (p=0.008 n=5+5)
wuffs_gif_decode_20k/gcc7                 227MB/s ± 0%   234MB/s ± 1%   +3.09%  (p=0.008 n=5+5)
wuffs_gif_decode_100k_artificial/gcc7     492MB/s ± 0%   506MB/s ± 1%   +2.91%  (p=0.008 n=5+5)
wuffs_gif_decode_100k_realistic/gcc7      201MB/s ± 0%   210MB/s ± 1%   +4.42%  (p=0.008 n=5+5)
wuffs_gif_decode_1000k/gcc7               203MB/s ± 0%   213MB/s ± 0%   +4.97%  (p=0.008 n=5+5)
wuffs_gif_decode_anim_screencap/gcc7     1.04GB/s ± 0%  1.06GB/s ± 0%   +2.61%  (p=0.008 n=5+5)