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List:       cairo
Subject:    Re: [cairo] Cairo 1.9.2 performance
From:       Paolo Bonzini <bonzini () gnu ! org>
Date:       2009-06-29 6:23:54
Message-ID: 4A485DFA.5030108 () gnu ! org
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Zack Weinberg wrote:
> Clemens Eisserer <linuxhippy@gmail.com> wrote:
> 
>>> This is particularly true
>>> for gcc which is not known to produce blazingly fast code anyway
>> Any results to back that claim, otherwise please don't spread fud.
> 
> It is certainly true of the code generated at -O0, which doesn't even
> try to keep things in registers.
> 
> -O2 and -Os have been competitive with proprietary compilers on a wide
> range of benchmarks for years now.  It's worth trying both and seeing
> which works better.

And if you can pinpoint to specific inner loops that MSVC compiles
better than GCC, please report them on GCC's Bugzilla and CC me (hi Zack
:-).

Paolo


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