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Subject: Re: Crafty 1910 SE (2) vs Ruffian 2

Author: Mike Byrne

Date: 14:43:49 02/07/04

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On February 07, 2004 at 17:33:37, Paul Doire wrote:

>Hi ,
>This is with Mike's new compile.
>542 Mhz, Win98SE
>128MBRam, 16Hash
>3,4,5 Tablebases
>Ponder Off
>Own Books
>5 Min blitz games
>
>CraftySE(2) vs Ruffian 2 Own books Blitz  5'
>
>                     123456789012345678901234567890
>1   Ruffian 2.0.0    01010½1½1001½101011001½0010011 15.0/30  225.00
>2   Crafty 19.10 SE  10101½0½0110½010100110½1101100 15.0/30  225.00
>
>Crafty looks good here. Also Mike on my machine your newest compile
>is faster than both Dann's and Peter's.

It's hard to believe 10%-15% speed up makes a difference - but it seem to for
Crafty against Ruffian.  The latest PGO version is about 10-15% faster on all
non P4 Intel processors.  This includes P3s, AMDs and Celerons.  For ALL P4s (so
far) , the original version (dated 2/2/04) is faster.  Ironically, the PGO
version was compiled with Intel's Profile Guided Optimizations tool.  this tool
makes a faster compile for the non P4 (AMD, etc)) and a slower compile for P4s
(Intel).

I have a P4 (Intel).  Based on the benchmarks received, Crafty is much faster on
AMD on a per/GHz basis.  In the old world (pre P4), that never used to happen.
My next machine may be an AMD processor based.




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