Re: MacIntel apps behaves weirdly when compiled with -02 not -01 - Almost solved(auto-vectorization issue)
Re: MacIntel apps behaves weirdly when compiled with -02 not -01 - Almost solved(auto-vectorization issue)
- Subject: Re: MacIntel apps behaves weirdly when compiled with -02 not -01 - Almost solved(auto-vectorization issue)
- From: Mark Wagner <email@hidden>
- Date: Fri, 13 Jan 2006 12:01:22 -0800
On 1/13/06, Olivier Tristan <email@hidden> wrote:
> Os do not remove some optims as written in the doc ?
> I don't reallly care if the binary is 10% bigger. Only CPU usage is
> important in audio apps :)
This was true back in the days of small CPU caches and fast memory
access. Now, with large CPU caches and CPUs that run much faster than
main memory, if you can make the application small enough that the
processing loop fits entirely within the L2 cache (or better, the L1
cache), then the application will run faster than a more heavily
optimized one that needs to access main memory for program code.
--
Mark Wagner
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