I had a play with autoconf (inspired heavily by m4/debug.m4), can confirm the behaviour works as follows:
# build with slice-by-8 (default enabled) ./configure make gltests/bench-crc 1000000 real 1.714850 user 1.715 sys 0.000 # build without slice-by-8 ./configure --disable-crc-slice-by-8 make gltests/bench-crc 1000000 real 7.500251 user 7.500 sys 0.000 I don't know what the "serial" field is for so happy for this to be changed to whatever you like On Sun, 27 Oct 2024 at 16:56, Bruno Haible <br...@clisp.org> wrote: > Simon Josefsson wrote: > > I am not certain about the method to enable/disable the optimization, > > is the configure.ac variable the best method we have? > > An AC_ARG_ENABLE invocation can be added. Since Sam said that he's not > familiar > with Autoconf, it would be your turn to add it... > > Bruno > > > >
0001-crc-New-optimised-slice-by-8-implementation.patch
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