tree 4325c64c3608107881cc4e01f4ba7e6d65d5b22d
parent 81ba41e2511fc2a5bba87a4de24ca16592417179
author Nigel Tao <nigeltao@golang.org> 1613216094 +1100
committer Nigel Tao <nigeltao@golang.org> 1613217287 +1100

Add base.arm_crc32_u32 type

On a Raspberry Pi 4 (32-bit armv7l) with -march=native and -mfpu=neon
("native" means "armv8-a+crc+simd"):

wuffs_crc32_ieee_10k/clang9                                825MB/s ± 0%  6802MB/s ± 0%  +724.00%  (p=0.008 n=5+5)
wuffs_crc32_ieee_100k/clang9                               837MB/s ± 0%  6199MB/s ± 0%  +640.25%  (p=0.008 n=5+5)

wuffs_crc32_ieee_10k/gcc8                                  960MB/s ± 0%  4495MB/s ± 0%  +368.35%  (p=0.016 n=4+5)
wuffs_crc32_ieee_100k/gcc8                                 961MB/s ± 0%  4447MB/s ± 0%  +363.01%  (p=0.016 n=5+4)

mimic_crc32_ieee_10k                                       638MB/s ± 0%   631MB/s ± 0%    -1.17%  (p=0.008 n=5+5)
mimic_crc32_ieee_100k                                      639MB/s ± 0%   639MB/s ± 0%    +0.02%  (p=0.008 n=5+5)

wuffs_gzip_decode_10k/clang9                              83.0MB/s ± 0%  90.7MB/s ± 0%    +9.26%  (p=0.008 n=5+5)
wuffs_gzip_decode_100k/clang9                              100MB/s ± 0%   112MB/s ± 0%   +11.91%  (p=0.008 n=5+5)

wuffs_gzip_decode_10k/gcc8                                86.1MB/s ± 0%  91.9MB/s ± 0%    +6.72%  (p=0.008 n=5+5)
wuffs_gzip_decode_100k/gcc8                                102MB/s ± 0%   112MB/s ± 0%    +9.34%  (p=0.008 n=5+5)

mimic_gzip_decode_10k                                     98.8MB/s ± 0%  98.2MB/s ± 0%    -0.60%  (p=0.008 n=5+5)
mimic_gzip_decode_100k                                     128MB/s ± 0%   128MB/s ± 0%    -0.08%  (p=0.008 n=5+5)

wuffs_png_decode_image_19k_8bpp/clang9                    67.6MB/s ± 0%  70.8MB/s ± 0%    +4.72%  (p=0.008 n=5+5)
wuffs_png_decode_image_40k_24bpp/clang9                   92.8MB/s ± 0%  98.8MB/s ± 0%    +6.49%  (p=0.008 n=5+5)
wuffs_png_decode_image_77k_8bpp/clang9                     255MB/s ± 0%   269MB/s ± 0%    +5.44%  (p=0.008 n=5+5)
wuffs_png_decode_image_552k_32bpp_ignore_checksum/clang9   123MB/s ± 0%   123MB/s ± 0%    +0.13%  (p=0.008 n=5+5)
wuffs_png_decode_image_552k_32bpp_verify_checksum/clang9   110MB/s ± 0%   112MB/s ± 0%    +1.46%  (p=0.008 n=5+5)
wuffs_png_decode_image_4002k_24bpp/clang9                 88.4MB/s ± 0%  92.8MB/s ± 0%    +4.90%  (p=0.008 n=5+5)

wuffs_png_decode_image_19k_8bpp/gcc8                      67.2MB/s ± 0%  70.8MB/s ± 0%    +5.37%  (p=0.008 n=5+5)
wuffs_png_decode_image_40k_24bpp/gcc8                     94.0MB/s ± 0%  98.2MB/s ± 0%    +4.45%  (p=0.008 n=5+5)
wuffs_png_decode_image_77k_8bpp/gcc8                       236MB/s ± 0%   248MB/s ± 0%    +4.84%  (p=0.008 n=5+5)
wuffs_png_decode_image_552k_32bpp_ignore_checksum/gcc8     114MB/s ± 0%   115MB/s ± 0%    +1.11%  (p=0.008 n=5+5)
wuffs_png_decode_image_552k_32bpp_verify_checksum/gcc8     102MB/s ± 0%   104MB/s ± 0%    +2.17%  (p=0.008 n=5+5)
wuffs_png_decode_image_4002k_24bpp/gcc8                   88.8MB/s ± 0%  94.3MB/s ± 0%    +6.21%  (p=0.008 n=5+5)

mimic_png_decode_image_19k_8bpp                           43.7MB/s ± 1%  43.4MB/s ± 1%      ~     (p=0.095 n=5+5)
mimic_png_decode_image_40k_24bpp                          54.6MB/s ± 0%  53.9MB/s ± 0%    -1.25%  (p=0.008 n=5+5)
mimic_png_decode_image_77k_8bpp                            125MB/s ± 0%   124MB/s ± 0%    -0.73%  (p=0.008 n=5+5)
mimic_png_decode_image_552k_32bpp_ignore_checksum               skipped
mimic_png_decode_image_552k_32bpp_verify_checksum          102MB/s ± 0%   101MB/s ± 0%    -0.95%  (p=0.008 n=5+5)
mimic_png_decode_image_4002k_24bpp                        81.3MB/s ± 0%  81.0MB/s ± 0%    -0.46%  (p=0.016 n=4+5)