https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94373
Martin Jambor <jamborm at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=98782 Summary|548.exchange2_r run time is |548.exchange2_r run time is |7-12% worse than GCC 9 at |16-35% worse than GCC 9 at |-O2 and generic march/mtune |-O2 and generic march/mtune Ever confirmed|0 |1 Status|UNCONFIRMED |NEW Last reconfirmed| |2021-02-04 --- Comment #5 from Martin Jambor <jamborm at gcc dot gnu.org> --- The regression is confirmed, it is now 35% on Cascadelake, 20% on Zen3 and 16% on Zen2 against GCC 9 (19%, 12% and 8% respectively against GCC 10) LNT sees it too: - on znver2 (though with LTO): https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=278.407.0&plot.1=298.407.0& - on znver1: https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=303.407.0&plot.1=31.407.0& - on a Kabylake: https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=206.407.0&plot.1=30.407.0& I wonder whether the RA issue PR 98782 might be also related, although it mostly focuses on -O3.