Author: Danniel Corbit
Date: 22:12:11 09/18/98
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On September 18, 1998 at 21:50:58, Robert Hyatt wrote: [snip] >>On a 200mhz computer, Fritz5 claims to examine 200,000 positions per second, and >>Crafty only about 80,000 per second. Yesterday I was only getting about 50,000 >>positions per second out of Crafty on a 400 mhz PII, so I wonder how >>much Windows 95 drags down the search? Could this be a reason why some chess >>programs still use DOS? > >that is too low for crafty... it should hit a floor of 50-55K nodes per second >on a 200 megahertz P6/200, which is about 1/2 the speed of your PII/400. It >sounds like maybe you somehow had two crafties running, which can happen with >winboard and win95... Something is very funny about his configuration. I get between 100K/sec and 200K/sec on a 300 Mhz PII using Windows NT. There is a small (5% or so) degdradtation from using Windows 95, but he should get four or five times as many is he is getting. The PII does MUCH better than the other pentium class chips for some reason. I have a P5 133 and a P5 166 at home, and they only get about 35K/sec, so they don't get nearly as much per Mhz as the PII. I have tweaked Crafty some, and use MSVC++ 6.0 to compile it. I also have an ALPHA NT version, if someone wants it (built with the MSVC++ 5 compiler, since 6 is not ready yet for ALPHA). If you do, send an email to dcorbit@solutionsiq.com and I'll give you a copy. Right now, I am benching the ALPHA NT version on a huge file of EPD positions. [snip]
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