Hi all, A new RFC has been opened here: https://gitlab.archlinux.org/archlinux/rfcs/-/merge_requests/2
Summary: Make -march=x86_64-v2 the default for our packages. This assumes the following instruction sets which are essentially available on all but the oldest AMD CPUs: CMPXCHG16B, LAHF-SAHF, POPCNT, SSE3, SSE4.1, SSE4.2, SSSE3 Please visit the above link for discussion. Allan