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Subject: Re: WCCC: Almost no hardwareadvantage for Crafty

Author: Robert Hyatt

Date: 08:56:05 06/29/04

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On June 29, 2004 at 11:25:08, Jaime Benito de Valle Ruiz wrote:

>On June 29, 2004 at 08:26:15, Zach Wegner wrote:
>
>>One important point is that crafty uses bitboards, so it will have an additional
>>speedup on a 64 bit processor.
>
>I might be wrong, but I think that Fritz also uses bitboards (I don't know about
>Shredder).
>Anyway, what about the compiler? And what extra efficiency do you expect from a
>64-bit processor? Enough to outsearch all other engines running on similar
>processors?
>
>Jaime


AMD has tested Crafty to answer this question.  They compiled it for 32 bits,
and for 64 bits.  The 64 bit version runs 47% faster than the 32 bit version,
everything else remaining constant.

Fritz does not use bitboards by the way...

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