[Bug c++/97094] Compiling big std::unordered_map<std::string, bool> became slower

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97094

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you try to specify an explicit -std=c++xy?