[MPlayer-dev-eng] Using -O4 vs. -Os

[Diego Biurrun]

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.

Diego