tree 2104ff12a57846bff03a652a8cfae0d4e279679f
parent 5dd7ede975f9730ff326af3a0d6504773486bd94
author Nigel Tao <nigeltao@golang.org> 1616634867 +1100
committer Nigel Tao <nigeltao@golang.org> 1616636282 +1100

Have script/bench-*-png convert to BGRA

On a mid-range x86_64 laptop:

Compared to the previous commit:

go_decode_19k_8bpp                      39.3MB/s ± 1%  39.4MB/s ± 1%     ~     (p=0.548 n=5+5)
go_decode_40k_24bpp                     46.5MB/s ± 1%  46.7MB/s ± 1%     ~     (p=0.095 n=5+5)
go_decode_77k_8bpp                      78.3MB/s ± 0%  78.3MB/s ± 0%     ~     (p=0.286 n=4+5)
go_decode_552k_32bpp_verify_checksum     120MB/s ± 1%   118MB/s ± 0%     ~     (p=0.056 n=5+5)
go_decode_4002k_24bpp                   50.7MB/s ± 0%  50.5MB/s ± 0%   -0.58%  (p=0.016 n=5+4)

rust_decode_19k_8bpp                    88.3MB/s ± 0%  89.8MB/s ± 0%   +1.76%  (p=0.008 n=5+5)
rust_decode_40k_24bpp                    133MB/s ± 0%   122MB/s ± 0%   -8.58%  (p=0.008 n=5+5)
rust_decode_77k_8bpp                     180MB/s ± 0%   158MB/s ± 0%  -12.04%  (p=0.008 n=5+5)
rust_decode_552k_32bpp_verify_checksum   146MB/s ± 0%   136MB/s ± 0%   -6.59%  (p=0.016 n=4+5)
rust_decode_4002k_24bpp                  134MB/s ± 0%   122MB/s ± 0%   -9.02%  (p=0.008 n=5+5)

Compared to libpng (the C library):

libpng_decode_19k_8bpp                                 58.0MB/s ± 0%  1.00x
libpng_decode_40k_24bpp                                73.1MB/s ± 0%  1.00x
libpng_decode_77k_8bpp                                  177MB/s ± 0%  1.00x
libpng_decode_552k_32bpp_verify_checksum                146MB/s ± 0%  1.00x
libpng_decode_4002k_24bpp                               104MB/s ± 0%  1.00x

go_decode_19k_8bpp/go1.16                              39.4MB/s ± 1%  0.68x
go_decode_40k_24bpp/go1.16                             46.7MB/s ± 1%  0.64x
go_decode_77k_8bpp/go1.16                              78.3MB/s ± 0%  0.44x
go_decode_552k_32bpp_verify_checksum/go1.16             118MB/s ± 0%  0.81x
go_decode_4002k_24bpp/go1.16                           50.5MB/s ± 0%  0.49x

rust_decode_19k_8bpp/rust1.48                          89.8MB/s ± 0%  1.55x
rust_decode_40k_24bpp/rust1.48                          122MB/s ± 0%  1.67x
rust_decode_77k_8bpp/rust1.48                           158MB/s ± 0%  0.89x
rust_decode_552k_32bpp_verify_checksum/rust1.48         136MB/s ± 0%  0.93x
rust_decode_4002k_24bpp/rust1.48                        122MB/s ± 0%  1.17x