gRRosminet wrote:
> 
> I have downloaded the official binary for linux and ran the benchmark.
> 
> Official : 45 minutes 08 seconds ( 2708 seconds )
> gcc pentium4 optimized : 36 minutes 43 seconds ( 2203 seconds )
> ICC pentium4 optimized : 33 minutes 01 seconds ( 1981 seconds )
> 
> ratios (official / optimized) :
> Official : 1
> gcc pentium4 optimized : 1.229
> icc pentium4 optimized : 1.367

My test results look quite different:

official 3.5:              2394s
3.6 RC1 (gcc 3.4):         2292s
3.6, optimized* (gcc 3.4): 2274s

*) -march=athlon-xp -mfpmath=sse -mmmx -msse -m3dnow

And before someone asks: profiling based optimization also does not 
change much about this (i tested this some time ago).

The most likely explanation for your results to me seems the pentium 4 
being particularly bad at running code not specifically optimized for 
its design.

Christoph

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