Author: Enrique Irazoqui
Date: 03:16:57 05/29/98
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On May 29, 1998 at 04:42:06, Ernst A. Heinz wrote: >On May 28, 1998 at 20:01:08, Enrique Irazoqui wrote: >> >>On a PII/300 >> 100MB 50MB 25MB >>BS2830-14 208'' 224'' 301'' >>BT2630-09 404'' 406'' 435'' >> >> >>On a P200MMX >> 100MB 40MB 22MB >>BT2630-09 524'' 560'' >>Fritzmark 174 156 154 >> >>Chessbase claim that by increasing hashtables from 40 MB to 100 MB on a >>P200MMX, Fritz 5 is 50 Elo points stronger. It doesn't make sense to me >>that doubling RAM has the same effect as doubling the processor speed. >>After the times above, maybe going from 25 to 100 MB hash Friz 5 can >>become some 20 points stronger. > >The long-standing rule of thumb in the computer-chess literature >states that each doubling of hash-table size gives you about >7% better performance (see e.g. Hsu's Ph.D. thesis). Hashtables are designed very differntly in different programs. For instance, Rebel 9 goes slower with 60 MB tables than with 28 MB and Fritz 5 would go faster with this same change in size. I wonder in which cases such an equation can apply. Enrique >=Ernst=
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