[xiphias2]

It's cool, I would love to have this for ARMv8 Mac

[gergo_barany]

The LLVM project has a tool called llvm-mca that does this. Example: https://gcc.godbolt.org/z/7zcova1ce

The version in the Compiler Explorer wouldn't work on AArch64 without an -mcpu flag and I didn't know what to pass, so I copied -mcpu=cyclone from https://djolertrk.github.io/2021/11/05/optimize-AARCH64-back.... You'd have to look up the correct one for your Mac's CPU.