This measurement is very focused on bit-related instructions. A few months ago we did some work on our (RemObjects) toolchain, and it showed very similar results, where our published benchmarks were for floating point.[0] I did some rough internal measurements showing the same for integer-related instructions too.

The same conclusion: v2 as baseline, v3 where possible.

I'm really surprised it's not standard in every toolchain to support arch levels like this today.

Some compilers like Clang allow multiple arch versions in one binary, runtime dispatched. I would love to implement this in our toolchain too.

[0] Please forgive the SEO-style title, it's, well, to get search engines to recognise what's in the article: https://blogs.remobjects.com/2026/01/26/fast-math-in-six-lan...