Author: Christophe Theron
Date: 10:21:34 05/15/01
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On May 14, 2001 at 23:43:25, Steve Maughan wrote:
>Alain,
>
>>Mmmm...very interesting.O.k then ...how much nps can we expect from your
>>program on a pocketPC running on a strongarm 206 mhz?
>
>Apparently Crafty ports do 5000 nps compared to 70000 nps on a 200 MHz PPro. I
>assume that Tiger will be (much) more PocketPC friendly since Crafty has large
>datastructures and I doubt it could be ported to the Palm. So let's assume that
>tiger managers 1/10 of the speed of a 200 MHz PPro. This would give a speed of
>approximately 10,000 nps. That would be one powerful PocketPC app!
>
>Regards,
>
>Steve
I think it will do better than that. Using Crafty as a reference is probably
misleading here, because Crafty uses a lot of 64 bits integers, and on a 32 bits
processor it is extremely handicapping.
Tiger uses mostly 16 bits integers, some 32 bits integers (but less than
previous versions, which allowed it to run on the Palm without too much
slowdown) and very few 64 bits integers (mostly for hash keys computations,
there must be approximately 2 xor operations with 64 bits integers for each
position searched).
Christophe
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