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Robert Hyatt
Joined: 27 Feb 2006 Posts: 15820 Location: Birmingham, AL
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Post subject: Re: question about symmertic evaluation Posted: Sat May 26, 2007 5:25 pm |
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OK, here's the results. I added an x = y / z; type operation at the very top of Evaluate(). the values were all global, and y and z are changed so that the compiler can't play any hanky-panky with getting rid of them and replacing the divide with a constant. I also use the value elsewhere so that it has to change correctly.
log.001: time=6.75 mat=0 n=12424532 fh=93% nps=1.8M
log.002: time=6.74 mat=0 n=12424532 fh=93% nps=1.8M
So I see absolutely no difference in speed at all...
Bob
BTW both were compiled using intel's 64 bit compiler, with PGO. the first run is without the divide, the second is with. |
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Author |
Date/Time |
question about symmertic evaluation |
Uri Blass |
Wed May 23, 2007 7:53 pm |
Re: question about symmertic evaluation |
Uri Blass |
Wed May 23, 2007 8:45 pm |
Re: question about symmertic evaluation |
Gerd Isenberg |
Wed May 23, 2007 8:46 pm |
Re: question about symmertic evaluation |
Uri Blass |
Wed May 23, 2007 9:04 pm |
Re: question about symmertic evaluation |
Robert Hyatt |
Wed May 23, 2007 9:51 pm |
Re: question about symmertic evaluation |
Uri Blass |
Wed May 23, 2007 10:04 pm |
Re: question about symmertic evaluation |
Gerd Isenberg |
Wed May 23, 2007 10:09 pm |
Re: question about symmertic evaluation |
Robert Hyatt |
Thu May 24, 2007 12:01 am |
Re: question about symmertic evaluation |
Gerd Isenberg |
Thu May 24, 2007 7:37 am |
Re: question about symmertic evaluation |
H.G.Muller |
Thu May 24, 2007 8:06 am |
Re: question about symmertic evaluation |
Gerd Isenberg |
Thu May 24, 2007 9:24 am |
Re: question about symmertic evaluation |
H.G.Muller |
Thu May 24, 2007 10:39 am |
Re: question about symmertic evaluation |
Gerd Isenberg |
Thu May 24, 2007 11:36 am |
Re: question about symmertic evaluation |
H.G.Muller |
Thu May 24, 2007 11:55 am |
Re: question about symmertic evaluation |
Gerd Isenberg |
Thu May 24, 2007 7:46 pm |
Re: question about symmertic evaluation |
Robert Hyatt |
Thu May 24, 2007 8:18 pm |
Re: question about symmertic evaluation |
Gerd Isenberg |
Thu May 24, 2007 8:55 pm |
Re: question about symmertic evaluation |
Uri Blass |
Fri May 25, 2007 10:44 am |
Re: question about symmertic evaluation |
Gerd Isenberg |
Fri May 25, 2007 6:28 pm |
Re: question about symmertic evaluation |
Uri Blass |
Fri May 25, 2007 7:42 pm |
Re: question about symmertic evaluation |
Gerd Isenberg |
Fri May 25, 2007 8:00 pm |
Re: question about symmertic evaluation |
Robert Hyatt |
Thu May 24, 2007 8:13 pm |
Re: question about symmertic evaluation |
Gerd Isenberg |
Thu May 24, 2007 8:33 pm |
Re: question about symmertic evaluation |
Robert Hyatt |
Sat May 26, 2007 1:05 am |
Re: question about symmertic evaluation |
Gerd Isenberg |
Sat May 26, 2007 7:18 am |
Re: question about symmertic evaluation |
Robert Hyatt |
Sat May 26, 2007 5:08 pm |
Re: question about symmertic evaluation |
Robert Hyatt |
Sat May 26, 2007 5:25 pm |
Re: question about symmertic evaluation |
Gerd Isenberg |
Sat May 26, 2007 6:23 pm |
Re: question about symmertic evaluation |
Robert Hyatt |
Sun May 27, 2007 2:48 pm |
Re: question about symmertic evaluation |
Steven Edwards |
Thu May 24, 2007 3:42 am |
Re: question about symmertic evaluation |
Robert Hyatt |
Thu May 24, 2007 8:20 pm |
Re: question about symmertic evaluation |
Robert Hyatt |
Wed May 23, 2007 9:50 pm |
Re: question about symmertic evaluation |
William H. Rogers |
Fri May 25, 2007 7:48 pm |
Re: question about symmertic evaluation |
Uri Blass |
Sat May 26, 2007 11:38 am |
Re: question about symmertic evaluation |
H.G.Muller |
Sat May 26, 2007 2:07 pm |
Re: question about symmertic evaluation |
Vincent Diepeveen |
Sat May 26, 2007 7:27 pm |
Re: question about symmertic evaluation |
Gerd Isenberg |
Sat May 26, 2007 8:20 pm |
Re: question about symmertic evaluation |
Uri Blass |
Sat May 26, 2007 9:29 pm |
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