-O2 vs. -O3

James Richard Tyrer <[email protected]>
Newsgroups gmane.comp.kde.cafe
Message-ID <[email protected]> 
I had this odd thought last week: does -O3 optimization really 
make an executable run faster on a system with a L3 cache?

IIUC, -O3 optimization unrolls loops, but caching is based on the 
theory that the same code will be run more than once.

Has anybody ever tried this -- like with the PNG libraries for 
example??

--
JRT


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