Re: Opinion question (Core2 Duo)
On Tue, 2007-09-18 at 09:29 -0400, Lennart Sorensen wrote:
> On Tue, Sep 18, 2007 at 02:18:34PM +0200, Helge Hafting wrote:
> > My experimental sudoku solving program is 3x faster on
> > a 1.8GHz 64-bit opteron, than on a 2.4GHz 32-bit pentium. In this case,
> > a slow 64-bit processor beats a faster 32-bit processor 3x.
>
> And an athlon64 3500+ (2.2GHz) runs bzip2 5x faster than a 2.8GHz
> Pentium 4. The pentium 4 HATES branch heavy code when the branch
> prediction fails to work (which essentially by definition it has to on
> compression and other optimizing/solving problems). It might have been
> a good design for multimedia streaming operations, but it really sucks
> at many general purpose tasks. I never did like the pentium 4 even from
> day 1.
And in case anyone's not keeping up at the back: Pentium 4 and Core 2
have nothing whatsoever in common, other than the ability to run x86
code. Core 2 is a screamingly fast chip, Pentium 4 wasn't
--
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/ Jo Shields <jms@osc.ox.ac.uk> \
| Systems Manager, |
\ Oxford Supercomputing Centre /
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