Re: gcc 3.2 makes slower code

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Article #426

#426

From: Jeffrey Cunningham
Date: Fri, 29 Nov 2002 00:52

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I've re-run my simulation with the following flags, as suggested by Moritz
Franosch:

-O3 offast-math -funroll-loops -march=i686

It made it slightly faster. So here's the summary:

2.95 w/-O3: 0.17 minutes per iteration
3.2 w/-O3:  0.28 minutes per iteration
3.2 w/-MF:  0.24 minutes per iteration

(MF=Moritz Franosch's flags). 

Better, but no cigar.I haven't tried either the -Ox or the
-fstrict-aliasing yet. Later...

-Jeff

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From: "Jeffrey Cunningham" <jeffrey@cunningham.net>
Subject: Re: gcc 3.2 makes slower code
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