https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92584
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> --- (In reply to rguent...@suse.de from comment #1) > On Tue, 19 Nov 2019, marxin at gcc dot gnu.org wrote: > > > I noticed that the speed drop back on the trunk happened since r278281. > > Would you be interested in what loop optimization made the difference? > > Well, the revs probably caused changes in (early) unrolling with the > better performance seen with less unrolling. We know that even more > unrolling will increase performance though. Ok, so the benchmark likes unrolling :) > > Not sure what you are asking? My question is simple: Can we somehow tweak our defaults so that we can speed up calculix. Note that the speed up is 2x.
