On Sun, Dec 6, 2020, 18:36 NightStrike <nightstrike@xxxxxxxxx> wrote: > Is there a way to get gcc to tell you if it could optimize better with > profiling information? In other words, it'd be nice to know how much, > roughly speaking, profile based optimization would have an effect before > going through the trouble of setting it up. Like, if gcc could say, "just > fyi, i could make this loop potentially twice as fast if you give me a > profile to work with". Or, "yeah, even with a profile, that function won't > get much better." > > If it could tell me next week's lottery numbers, too, that'd be great. > Maybe that's easier :) > Just wondering if this is possible. >
