https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65076
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |5.0 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- So it's either time spent in the inliner (unlikely, though the patch has an extra update_callee_keys call) or different (early) inlining decisions. I remember you saying that without LTO/PGO-ing GCC the difference is a lot smaller?