And that’s before accounting for SP which the compiler will usually avoid touching. So for an x86 target, omitting the frame pointer means going from 6 to 7 usa

And that’s before accounting for SP which the compiler will usually avoid touching. So for an x86 target, omitting the frame pointer means going from 6 to 7 usable registers, on x86-64 it’s 14 to 15, a lot less necessary outside of very specific work loads.