https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89853
Martin Jambor <jamborm at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |WONTFIX --- Comment #6 from Martin Jambor <jamborm at gcc dot gnu.org> --- Hi, the assembly of the most affected function does not change at all, just its offset (is 0x10 bytes bigger). Aligning the loops in the function a bit more avoids most of the slowdown but not quite all of it. In any event, this is a microarchitectural problem that we probably cannot do anything about. Sorry for the noise, I will check for this the next time before I report a problem.