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Subject: Re: Many Crafty versions, many compile versions, different bench results??

Author: Bob Durrett

Date: 16:53:30 12/08/02

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On December 08, 2002 at 18:33:38, Matt Taylor wrote:

>On December 08, 2002 at 17:10:58, Edward Seid wrote:
>
>>The thing I don't like about using Crafty to compare benchmarks is that everyone
>>uses different versions of Crafty.  In addition, for any particular version,
>>there's the Eugene Nalimov compile, the Dann Corbit compile, and who knows what
>>other compiles, all giving different bench results.  It would be hard to compare
>>my machine vs other people's unless we know we're using the exact same version
>>and compile.
>>
>>Perhaps a better choice would be a more established program like Yace 0.99.56
>>which has been the same version for over 1 year.  But I don't know if it has a
>>bench command.
>>
>>On December 08, 2002 at 16:31:06, Matt Taylor wrote:
>>
>>>Sandra is like any other synthetic benchmark: not indicitive of real-world
>>>performance.
>>>
>>>The best benchmark I know of is running an actual chess engine (e.g. Crafty) and
>>>reporting nps.
>
>Well, there are two metrics to consider. You can consider a general optimized
>version of a chess engine not optimized for a specific processor. You can also
>consider specially optimized forms for each processor.
>
>In this case, I think the latter is likely more important since people will want
>to optimize a particular chess engine for their system. Determining standard
>builds is quite difficult, though. Perhaps that's why nobody has done it. :-)
>
>And yes, any particular chess engine will do. I picked Crafty arbitrarily, but
>just about any relatively complex engine will work.
>
>-Matt

As soon as the hardware technology changes, even a tiny bit, your "standard"
program will become obsolete.

Bob D.



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