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From: "Daniel Lidström" <danli97 AT NOSPAMite DOT mh DOT se>
Newsgroups: comp.os.msdos.djgpp,gnu.gcc.help
Subject: Re: GCC 3.03 makes slow code
Date: Wed, 16 Jan 2002 22:04:28 +0100
Organization: Solace Computer Society
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

"no spam" <no AT spam DOT com> wrote...
> I was testing the latest GCC 3.03 (djgpp) and compiled an application
> using switches -O9 -fomit-frame-pointer -mcpu=pentium -fschedule-insns2
> -fexpensive-optimizations the code it generated run 10-20% slower (on
> Celeron-A CPU) compared to a version compiled with GCC 2.95 (using
> identical switches).

Are you sure there is a optimization switch -O9? When I read the man pages
of gcc 2.95.3-5 (cygwin) the -O option only goes to -O3.

/Daniel