> The market has repeatedly and thoroughly rejected dispatching to different code paths based on CPU, so the only SIMD implementation that actually matters is t

> The market has repeatedly and thoroughly rejected dispatching to different code paths based on CPU, so the only SIMD implementation that actually matters is the lowest common denominator. RHEL just moved up to x86_64-v2, equivalent to 2009 level CPUs. And they’re an early mover, Fedora/Ubuntu/Arch have not done the same. Glibc has used CPU dispatching for str* and mem* functions for over a decade.