Author: Tom Kerrigan
Date: 14:41:03 03/27/03
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On March 27, 2003 at 17:20:02, Aaron Gordon wrote: >As far as speed goes.. if you use a very large hash table you can generally >(depending on the chess engine) expect to see a 2-10% increase in nodes per >second by doubling your ram speed (going from SDR to DDR for example). If you How did you get this data? Recently there were a number of posts about how Crafty doesn't get any faster even if you quadruple RAM speed. >So far I have noticed with Fritz 5.32 set to 255mb hash gets filled entirely in >about 1 minute at 2.5 million nodes/second on my AthlonXP 2.5GHz. It's not clear to me that the "fullness" of a hash table is a significant metric. It's the usefulness of the entries in the table that counts. Do you get better scores (or faster times to solutions) on test suites with really big hash tables? -Tom
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