You'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 co

You'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.