[ip26]

Is it generally possible to convert rep str sequences to AVX? Could the hardware or compiler already be doing this?

AVX is just the SIMD unit. I would argue the transistors were spent on SIMD, and the hitch is simply the best way to send str commands to the SIMD hardware.

[nwmcsween]

Why? IIRC something like 99% of string operations are on 20 chars or less. If you're hitting bottlenecks then optimize.

[ip26]

If you are arguing most string ops have just a few chars and therefore don’t use vectors… why do we need to spend silicon enhancing rep prefix in the first place?