tree 0b879f407ce21324d5e232840ee36ad5aff8e827
parent 44acd0e20a6a324e1c14a9cfae188a47839f24af
author Nigel Tao <nigeltao@golang.org> 1614995255 +1100
committer Nigel Tao <nigeltao@golang.org> 1615080465 +1100

Implement std/crc32 ieee_hasher.up_x86_sse42

On a mid-range x86_64 laptop:

----

$ ls -lh linux-5.11.3.tar.gz | awk '{print $5 " " $9}'
178M linux-5.11.3.tar.gz

$ # Debian's /usr/bin/crc32
$ time /usr/bin/crc32 /dev/stdin < linux-5.11.3.tar.gz > /dev/null
real    0m0.411s

$ # Wuffs; before
$ time gen/bin/example-crc32     < linux-5.11.3.tar.gz > /dev/null
real    0m0.137s

$ # Wuffs; after
$ time gen/bin/example-crc32     < linux-5.11.3.tar.gz > /dev/null
real    0m0.060s

----

Wuffs benchmarks:

wuffs_crc32_ieee_10k/clang9                               1.71GB/s ± 0%   8.40GB/s ± 3%  +391.97%  (p=0.008 n=5+5)
wuffs_crc32_ieee_100k/clang9                              1.73GB/s ± 1%  10.67GB/s ± 0%  +518.47%  (p=0.008 n=5+5)

wuffs_crc32_ieee_10k/gcc10                                2.08GB/s ± 0%   8.77GB/s ± 0%  +322.05%  (p=0.008 n=5+5)
wuffs_crc32_ieee_100k/gcc10                               2.10GB/s ± 0%  11.23GB/s ± 0%  +435.56%  (p=0.008 n=5+5)

mimic_crc32_ieee_10k                                       774MB/s ± 0%    776MB/s ± 0%    +0.23%  (p=0.016 n=5+5)
mimic_crc32_ieee_100k                                      773MB/s ± 0%    775MB/s ± 0%    +0.24%  (p=0.032 n=5+5)

wuffs_gzip_decode_10k/clang9                               151MB/s ± 0%    166MB/s ± 0%    +9.81%  (p=0.008 n=5+5)
wuffs_gzip_decode_100k/clang9                              155MB/s ± 0%    178MB/s ± 0%   +14.53%  (p=0.008 n=5+5)

wuffs_gzip_decode_10k/gcc10                                150MB/s ± 0%    172MB/s ± 0%   +14.92%  (p=0.008 n=5+5)
wuffs_gzip_decode_100k/gcc10                               188MB/s ± 0%    198MB/s ± 0%    +5.37%  (p=0.008 n=5+5)

mimic_gzip_decode_10k                                      121MB/s ± 0%    121MB/s ± 0%      ~     (p=1.000 n=5+5)
mimic_gzip_decode_100k                                     143MB/s ± 0%    144MB/s ± 0%      ~     (p=0.056 n=5+5)

wuffs_png_decode_image_19k_8bpp/clang9                     111MB/s ± 0%    115MB/s ± 0%    +3.77%  (p=0.008 n=5+5)
wuffs_png_decode_image_40k_24bpp/clang9                    147MB/s ± 0%    153MB/s ± 0%    +4.66%  (p=0.008 n=5+5)
wuffs_png_decode_image_77k_8bpp/clang9                     404MB/s ± 0%    415MB/s ± 0%    +2.75%  (p=0.016 n=5+4)
wuffs_png_decode_image_552k_32bpp_ignore_checksum/clang9   344MB/s ± 0%    345MB/s ± 1%      ~     (p=0.151 n=5+5)
wuffs_png_decode_image_552k_32bpp_verify_checksum/clang9   329MB/s ± 0%    335MB/s ± 0%    +1.78%  (p=0.016 n=5+4)
wuffs_png_decode_image_4002k_24bpp/clang9                  148MB/s ± 0%    153MB/s ± 0%    +3.38%  (p=0.008 n=5+5)

wuffs_png_decode_image_19k_8bpp/gcc10                      120MB/s ± 0%    123MB/s ± 0%    +2.62%  (p=0.008 n=5+5)
wuffs_png_decode_image_40k_24bpp/gcc10                     153MB/s ± 0%    159MB/s ± 1%    +3.54%  (p=0.008 n=5+5)
wuffs_png_decode_image_77k_8bpp/gcc10                      440MB/s ± 0%    452MB/s ± 0%    +2.82%  (p=0.008 n=5+5)
wuffs_png_decode_image_552k_32bpp_ignore_checksum/gcc10    357MB/s ± 0%    353MB/s ± 0%    -0.95%  (p=0.008 n=5+5)
wuffs_png_decode_image_552k_32bpp_verify_checksum/gcc10    341MB/s ± 0%    341MB/s ± 0%      ~     (p=0.151 n=5+5)
wuffs_png_decode_image_4002k_24bpp/gcc10                   157MB/s ± 0%    161MB/s ± 0%    +2.85%  (p=0.016 n=5+4)

mimic_png_decode_image_19k_8bpp                           58.1MB/s ± 0%   58.1MB/s ± 0%      ~     (p=0.389 n=5+5)
mimic_png_decode_image_40k_24bpp                          73.2MB/s ± 0%   73.2MB/s ± 0%      ~     (p=0.548 n=5+5)
mimic_png_decode_image_77k_8bpp                            177MB/s ± 0%    177MB/s ± 0%    +0.14%  (p=0.008 n=5+5)
mimic_png_decode_image_552k_32bpp_ignore_checksum               skipped
mimic_png_decode_image_552k_32bpp_verify_checksum          146MB/s ± 0%    147MB/s ± 0%    +0.13%  (p=0.016 n=5+5)
mimic_png_decode_image_4002k_24bpp                         104MB/s ± 0%    104MB/s ± 0%      ~     (p=0.556 n=5+4)