Thank you for including explicit usage cmdline :) Results with current slice_by_8 code
GL_CRC_SLICE_BY_8 not set $ gltests/bench-crc 1000000 real 7.502692 user 7.503 sys 0.000 $ gltests/bench-crc 1000000 real 7.481411 user 7.481 sys 0.000 $ gltests/bench-crc 1000000 real 7.525393 user 7.525 sys 0.000 GL_CRC_SLICE_BY_8 set $ gltests/bench-crc 1000000 real 1.777945 user 1.778 sys 0.000 $ gltests/bench-crc 1000000 real 1.777223 user 1.777 sys 0.000 $ gltests/bench-crc 1000000 real 1.783793 user 1.784 sys 0.000 $ uname -a Linux localhost 5.15.153.1-microsoft-standard-WSL2 #1 SMP Fri Mar 29 23:14:13 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux $ lscpu |grep "Model name" Model name: AMD Ryzen 5 5600 6-Core Processor On Wed, 16 Oct 2024 at 23:20, Bruno Haible <br...@clisp.org> wrote: > In preparation of Sam's improvements to the 'crc' module, it will be useful > to have a benchmark program, so that we can measure the speedups on various > CPUs. > > I'm committing this patch. To use it: > $ ./gnulib-tool --create-testdir --dir=../testdir --single-configure > --symlink crc > $ cd ../testdir > $ ./configure > $ make > $ gltests/bench-crc 1000000 > real 8.253921 > user 8.253 > sys 0.000 > > > 2024-10-16 Bruno Haible <br...@clisp.org> > > crc tests: Add a benchmark program. > * tests/macros.h (randomb): New declaration. > * tests/randomb.c: New file. > * tests/bench-crc.c: New file. > * modules/crc-tests (Files): Add them. Add tests/macros.h, > tests/bench.h. > (Depends-on): Add getrusage, gettimeofday. > (Makefile.am): Arrange to compile bench-crc. > >
