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Date: Fri, 13 Feb 1998 16:08:48 +0100
From: Philippe Elbaz-Vincent <pev AT pev DOT math DOT univ-montp2 DOT fr>
Organization: Laboratoire Geometrie,Topologie, Algebre UPRESA CNRS 5030
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To: Stefan Huelbrock <huelbroc AT informatik DOT uni-tuebingen DOT de>
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Subject: Re: -mpentiumpro slows things down (even on PentiumPro)
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Stefan Huelbrock wrote:

> This is considerable slower than the output of gcc 2.7.2.1.
> Is this still under development or is the compiler just thought for
> working well on a pentium with a slower pentiumpro-code as a
> tradeoff, or do I just miss anything? Maybee my installation isn't
> flawless? Do you experience the same?

I also have the same experience with a Pentium II (build with the souce)
and a Pentium Pro (with the binaries distrib)
try -mpentium instead, give better results
some flags in -O6 slow downs performance.
use -O3 and specific flag instead
but this is just some observations ....
Notice that with a Pentium MMX and pgcc-1.0.1 build on the machine,
performance are much better than with gcc ...

hope this could be helpfull,
Ph. 

-- 
Laboratoire Geometrie-Topologie et Algebre. UPRESA CNRS 5030.
E-mail: pev AT pev DOT math DOT univ-montp2 DOT fr | Phone: +33 (0)467143958 
http://www.math.univ-montp2.fr/~pev | Fax: +33 (0)467143558