Author: Vasik Rajlich
Date: 03:01:09 03/13/05
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On March 13, 2005 at 04:18:59, F. Reul wrote: >Hello, >a few weeks ago, I read an article in "ct-magazin" about the 64-bit-world. The >benchmark-test "186.crafty" promises 20 percent speed-increase with the new >64-bit-compilers of Intel and Microsoft with Windows x64 on a 64-bit-system. > >My question, can some programmers confirm these results, are there any articles >online to read about this, and is a speed-increase of bitboard-engines more >than 30 percent possible or not? > >Can the "microsoft-whidbey-compiler" optimize on 64-bit-systems with >"feedback-protocol", or is the "intel 8.1-compiler" better for bitboard-engines >? > >What´s about the speed-increase of classic-32-bit engines (0x88 or similar >architectures) ? > >I would be very happy, about a discussion :-)) > >Fritz Reul (List) Just about every engine runs significantly faster in 64 bits. It's been a while since I measured, but Rybka (rotated bitboards) does around 1100 Knps on a 64-bit Amd 3400+, 750 Knps on the same machine in 32-bit mode, and 650 Knps or so on a 3.2 GHz pentium. My 64-bit speedup was in the neighborhood of 50%. Vas
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