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Its embarrassing that Google binaries don't even use runtime instruction selection. https://wiki.debian.org/InstructionSelection
Nah, if you actually read into what's available there, it's clear that the compilers have never implemented features to make this broadly usable. You only get runtime instruction selection if you've manually tagged each individual function that uses SIMD to be compiled with function multi-versioning, so that's only really useful for known hot spots that are intended to use autovectorization. If you just want to enabl…
That seems like a job for well paid Google engineers rather than people who can only afford to get computers from dumpsters.