Date: Thu, 19 Oct 2000 16:48:51 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: djgpp AT delorie DOT com
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In-reply-to: <8smgof$l4f$1@nnrp1.deja.com> (gdemont@my-deja.com)
Subject: Re: Performance 2.7.2 -> 2.8.1
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> From: gdemont AT my-deja DOT com
> Newsgroups: comp.os.msdos.djgpp
> Date: Thu, 19 Oct 2000 10:00:49 GMT
> 
> Hi all. Did someone notice a degradation
> of performance of code generation with -O2,
> from GCC 2.7.2 to 2.8.1 in certain contexts,
> on Pentium processors, even though 2.8.1 brought
> the "-mpentium" option ?

There's no degradation, see section 14.2 of the FAQ for details.

Also, GCC 2.9x has much better optimizations for Pentium processors,
you might consider upgrading.