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Re: [Bug-gnubg] Benchmarks, experiments, speedups

From: Ingo Macherius
Subject: Re: [Bug-gnubg] Benchmarks, experiments, speedups
Date: Fri, 18 Mar 2005 10:56:59 +0100

I got figures on the impact of SSE3. All data from the same machine, which runs 
a P4-F ("Prescott") using my beta-2 binary.

 386: 21800 eval/s  (100%)
sse : 28600 eval/s  (131%)
sse2: 29800 eval/s (137%)
sse3: 31400 eval/s (144%)

So not unexpectedly the gain from 386 to SSE is largest (about 1/3), and SSE2 
and SSE3 each add about 6-7% to that.

For an intrinsic implementation this probably means that restricting oneself to 
SSE (rather than producing SSE2 and SSE3 versions as well) is good enough. See 
the 80:20 rule :)


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