https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21485
--- Comment #69 from Jeffrey A. Law <law at redhat dot com> --- So while gcc-10 improves things relative to gcc-9. THe gcc-3.4 code is still far and away better. On my box: gcc-10 1725-1775 gcc-3.4 3000-3050 Clearly it's not even close.
