A while back I knocked up some math benchmarks on my trusty G3 Pismo under Metrowerks CodeWarrior (a somewhat out of date(vanilla C) version which came out for 603/604e era)... and was pleasantly surprised to see it performed these tasks faster than a Win2000 laptop (1GHz P4) and Sun Ultra60.
I've now upgraded to a G4/450 based Mac and purchased OSX which so far is great. The old compiled code runs OK under classic. I tried recompiling these benchmarks under gcc (& x-code) using the -O3 flag and set up for a G4. The surprise is that these takes FIVE TIMES LONGER when recompiled than the old code under classic.
Are there any suggestions to better optimization flags etc or other (preferably free/cheap) compilers out there?
-- Pete.
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