https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92626
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- I'd say libgcc is extremely unlikely, for glibc it depends on whether the different clear snapshots (or releases or what it is) have each glibc compiled by a particular gcc snapshot or not, libstdc++ is unlikely, but it could be it, or in theory it could be kernel too, as long as you build it each time with the different gcc snapshot. So, I'd really recommend swapping the libraries one by one and rebenchmarking each time, including swapping the kernel.
