[MPlayer-dev-eng] Using -O4 vs. -Os
diego at biurrun.de
Wed Oct 15 02:17:54 CEST 2003
Zoltan Hidvegi writes:
> For the discussion about using -O4 vs. -Os, I've run sume benchmarks,
> on my Athlon XP Thoroughbred 2233 MHz, 194MHz fsb machine, using
> gcc-3.3.2 prerelease (debian unstable 3.3.2-0pre5).
I assume that much of the differences you see is related to cache
utilization. Please bear in mind that the code needs to run fast on a
modest machine also. At 2GHz you have plenty of horsepower to watch
all kinds of movies anyway. IMHO performance should be optimal in the
<=500MHz (and smaller cache) range where every bit really matters.
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