https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111600
--- Comment #25 from Robin Dapp <rdapp at gcc dot gnu.org> --- At least here locally the maximum I saw was 1.4 GB of RES for insn-emit-10.cc. That's still not ideal (especially when 8 or 10 of those files compile in parallel) but at least no 8 GB for a single file anymore.