https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107163
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- Yes, using -std=gnu++14 makes GCC 11 as fast as GCC 8.
redi at gcc dot gnu.org via Gcc-bugs Wed, 05 Oct 2022 13:39:17 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107163
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- Yes, using -std=gnu++14 makes GCC 11 as fast as GCC 8.