Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Hashtables: is larger always better?

Author: Peter Berger

Date: 23:08:46 09/22/01

Go up one level in this thread


On September 22, 2001 at 18:29:46, Andreas De Troy wrote:

>When I see results for the so called "Fritzmarks", I notice that the actual
>numbers decrease with increasing hashtables. Is this an artefact of the
>measurement? In other words, are larger hashtables always better? I suppose it
>depends of the speed of the processor. If you have, for instance an Athlon 1 Ghz
>(or a 1.5 Ghz or...), does it -in general- make sense to increase the size of
>the hashtables to 256 Mb, 512 Mb or more?
>
>Thanks in advance for any help!

Afaik the engine used during the "Fritzmark" is always Fritz5.32 - I think this
one used to clear its hashtables between every move which probably hurts the
performance in this test with very big tables.

For real games: many(most)current engines don't clear hashtables between moves
anymore - for those the bigger the better is a good rule ( as long as you avoid
swapping), even in fast blitz games.

pete



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.