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Subject: Re: how much does hash size limitation impact long games

Author: Joachim Rang

Date: 02:08:43 02/07/06

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On February 06, 2006 at 17:16:14, Joseph Ciarrochi wrote:

>hi folks,
>
>I have to use an old pentium 3 447 mhz computer to run engine vesus engine
>matches, because my good computer has to be used for actual work :(.
>
>I can only give the engines 32 mb of hash. If i play really long games, I
>presume this hash table will fill up quickly.
>
>How much of a performance decriment might i expect if i play long time controls
> with such a small hash (compared to if i had say, 512 hash).
>
>
>best
>Joseph


Christophe Theron once estimated a doubling of hash size to be worth 5
elopoints. That would mean 32 to 512 MB Hash is a difference of 20 Elopoints.
This of course is only true if the 512 MB Hash are really used. On your very old
447 Mhz computer this would require about 10min/move I suppose so really long
time control.

To answer youre question the difference won't probably noticeable.

regards
Joachim



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