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Re: Speed Problem with GSL VC Version


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On Sat, 16 Mar 2002 10:49:38 -0600 Li Liu wrote:

Li> At Linux, it takes only 0.8 seconds, and SAS takes 3.1 seconds.
Li> At PC, SAS still takes 3.1 seconds, but my program takes 3.7
Li> seconds!  I already modified the result with the different CPU
Li> speeds of two machines.  Is there so huge difference for GSL
Li> between Unix and Win32?

Did you compile GSL on Windows with VC [1], too?  Their compilers suck
with respect to speed! [2] You can use the mingw toolchain on Windoze
and see what you get.

You also have to consider that MHz is not all you have to correct for,
cache size, memory throughput, and such might be more important.

Greetings,
Jochen

Footnotes: 
[1]  I assume that is M$'s compiler.
[2]  Although one wouldn't expect that much of a difference. More in
     the 15--30% range in general, IIRC.
- -- 
Einigkeit und Recht und Freiheit                http://www.Jochen-Kuepper.de
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