* A priori profile optimization
@ 2020-12-07 4:36 NightStrike
2021-04-14 17:01 ` NightStrike
0 siblings, 1 reply; 2+ messages in thread
From: NightStrike @ 2020-12-07 4:36 UTC (permalink / raw)
To: gcc-help
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 :)
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: A priori profile optimization
2020-12-07 4:36 A priori profile optimization NightStrike
@ 2021-04-14 17:01 ` NightStrike
0 siblings, 0 replies; 2+ messages in thread
From: NightStrike @ 2021-04-14 17:01 UTC (permalink / raw)
To: gcc-help
On Sun, Dec 6, 2020, 18:36 NightStrike <nightstrike@gmail.com> 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.
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-12-07 4:36 A priori profile optimization NightStrike
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