Package: gcc-14 Version: 14.1.0-1 GCC 14 in Debian seems to be twice as slow as GCC 13. This was initially discovered on Reddit: https://www.reddit.com/r/cpp/comments/1cfzydb/gcc_14_twice_as_slow_as_gcc_13/ It seems that the following change is the cause: https://salsa.debian.org/toolchain-team/gcc/-/commit/6841377c19943a968b974aa7d65d78079bd5a884 That change is still active.