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Subject: Re: Slow EGTBs

Author: Dieter Buerssner

Date: 12:25:19 01/16/03

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On January 16, 2003 at 13:31:39, David Rasmussen wrote:

I have not read all the answers carefully, so sorry when I repeat some points.

For me, OS cache seems to be more important, when heavily probing TBs than the
Nalimov-Cache. Access in the Nalimov-Cache is of course faster, but more space
(a major factor) is needed, to cache the same number of positions. So,
especially in heavy TB-probing situations, it will be useful, if you have a big
ammount of free RAM, that the OS can (and will) use for cache.

Another thing - don't install all TBs. If your engines has problems with missing
promotion cases, you must be careful to select them. Don't define T41_INCLUDE.

Don'T forget to hash TB-positions. You can flag them somehow, so that they will
be good for a cutoff at any depth.

Regards,
Dieter



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