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Re: Latest snapshot produces slower code that egcs-1.0.3
- To: bagnara at DI dot Unipi dot IT (Roberto Bagnara)
- Subject: Re: Latest snapshot produces slower code that egcs-1.0.3
- From: Joe Buck <jbuck at synopsys dot com>
- Date: Tue, 2 Jun 98 14:44:42 PDT
- Cc: egcs at cygnus dot com, g++ at cygnus dot com
>...
> The problem now is that my application shows a 30% slowdown
> when compiled with egcs-19980531, i.e., egcs-1.0.3 gives
> a much better performance.
> My platform is i586/Linux. Another maybe useful indication
> is that my code is "STL intensive".
>
> Is there anything I can do to help tracking the problem?
If you can pinpoint particular small functions that exhibit a slowdown,
it should make it easier to figure out what is going wrong.
e.g. here is the function, here's the assembly from 1.0.3, here's
the assembly from the current snapshot.