Author: Uri Blass
Date: 02:58:27 02/28/04
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On February 28, 2004 at 03:33:00, Slater Wold wrote: >cl from the Windows 2003 Server DDK used in all compilations. No flags >(optimizations) were used. > >64-bit: >Microsoft (R) C/C++ Optimizing Compiler Version 14.00.2207 for AMD64 >Copyright (C) Microsoft Corporation 1984-2002. All rights reserved. > >32-bit: >Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 >Copyright (C) Microsoft Corp 1984-1998. All rights reserved. > > >Olithink: > >64-bit: >12 8 3121 22997307 b1-c3 d7-d5 d2-d4 g8-f6 c1-f4 c8-f5 g1-f3 b8-c6 e2-e3 > e7-e6 f1-b5 d8-d7 > >32-bit: >12 8 3284 22997307 b1-c3 d7-d5 d2-d4 g8-f6 c1-f4 c8-f5 g1-f3 b8-c6 e2-e3 > e7-e6 f1-b5 d8-d7 > > >TSCP: > >64-bit: >Nodes: 550778 >Best time: 1703 ms >Nodes per second: 323416 (Score: 1.330) > >32-bit: >Nodes: 550778 >Best time: 2875 ms >Nodes per second: 191574 (Score: 0.788) How it is possible that 32 bit program like tscp earns more than 50% speed from 64 bit compiler when bitboard based program like olithink earns almost nothing? I thought that 64 bits should help more bitboard programs but it seems that I understand nothing about it and I see no logical connection based on the results. The only tendency that I can see is that 64 bits help more bigger programs. Crafty is bigger than tscp when tscp is bigger than olithink but it may be also only a random observation. Uri
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