Author: Bo Persson
Date: 02:27:49 03/27/04
Go up one level in this thread
On March 26, 2004 at 08:34:42, Fabien Letouzey wrote: >On March 26, 2004 at 08:14:41, Slater Wold wrote: > >>On March 26, 2004 at 04:26:03, Fabien Letouzey wrote: >> >>>On March 26, 2004 at 01:30:02, Slater Wold wrote: >>> >>>>32-bit: 907,446 N/sec (20s from starting position) >>>> >>>>64-bit: 816,815 N/sec (20s from starting position) >>>> >>>>/O2, /Ot, /Og, /Ob2 >>>> >>>> >>>>If you're wondering, Fruit is not a bitboard program. :) >>> >>>Is this slow-down thing an isolated case? >>> >>>Fabien. >> >>Do you mean, is Fruit the only engine that slows down when compiled for 64-bit? >> >>Yes. > >I find it interesting; do you feel like investigating? > >One drawback of 64-bit ints and pointers is that they could take more space in >memory, but I thought I carefully avoided that everywhere ... But ints are still 32 bits in this compiler. You have to use 'long long' to get a 64 bit int. Pointers are longer though. Bo Persson >Fabien.
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