Author: Ernst A. Heinz
Date: 07:37:12 06/01/98
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On June 01, 1998 at 10:20:48, Dan Homan wrote: >On June 01, 1998 at 09:21:05, Ernst A. Heinz wrote: > >>On May 31, 1998 at 10:17:51, Moritz Berger wrote: >>> >>>Fritz gets 23% on the 35 positions in the LCT II testsuite from a >>>roughly 4-fold hash table increase from 12MB to 98MB (on P233MMX >>>hardware). >> >>Good example for the validity of the generally accepted 7% rule per >>doubling of transposition table size which I mentioned earlier ... >> >>Going from 12MB to 98MB is not a 4-fold but an *8-fold* increase >>in size which is equivalent to 3x doubling. The 7% rule then predicts >>a roughly 3x 7% = 21% better performance. Very close to your observed >>23% for "Fritz5", isnt' it? >> >>=Ernst= > >Actually, the 7% per doubling leads to (1.07)^3 = 1.225 or a 22.5% >increase >which is even closer to the 23% observed :) > > - Dan Dan, I intentionally wrote "... predicts a *roughly* 3x 7% = 21% better performance." because I assumed not everybody reading this thread easily understands the correct (1.07)^D for D times doubling. =Ernst=
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