2 ms·
> trying to spin up an instruction mix But this may change from compiler to compiler and from version to version of the same compiler. I think you may be bette
by Koshkin 5y ago
> trying to spin up an instruction mix
But this may change from compiler to compiler and from version to version of the same compiler. I think you may be better off writing assembly code directly rather than trying to coerce the compiler to do exactly what you want.
- vnorilo 5y agoYou'd be surprised how stable it actually is in practice. The occasional big swings in benchmarks tend to be due to compiler A pattern-matching an idiom that compiler B does not. Regressions from A.1 to A.2 are rare, and usually either bugs or that optimizer default target has shifted and now neglects whatever uarch you regressed on.