| Got the FFTW3 DLM Working in Windows... [message #37428] |
Thu, 18 December 2003 04:44  |
Brian
Messages: 27
Registered: March 2001
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Junior Member |
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Ok, I got the DLM that Henry Chapman posted working in IDL5.4 in
Windows2000.
Henry, for arrays around 512x512 or less, do you also find the built-in IDL
fft to be just as fast or faster? Are there any tricks for getting increased
execution time on smaller arrays?
I will post the modified DLM once I confirm that everything is in order.
regards,
brian
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| Re: Got the FFTW3 DLM Working in Windows... [message #37498 is a reply to message #37428] |
Fri, 19 December 2003 21:34  |
h_chapman
Messages: 4
Registered: March 2003
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Junior Member |
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"Brian" <brian.huether@NOdlrSPAM.de> wrote in message news:<d406d2dd3de6a46ab90f929ff3a6ab37@news.teranews.com>...
> Ok, I got the DLM that Henry Chapman posted working in IDL5.4 in
> Windows2000.
>
> Henry, for arrays around 512x512 or less, do you also find the built-in IDL
> fft to be just as fast or faster? Are there any tricks for getting increased
> execution time on smaller arrays?
>
> I will post the modified DLM once I confirm that everything is in order.
>
> regards,
>
> brian
Brian, great stuff! On Mac OS X I see moderate improvement for
512x512. The improvement drops with the array size and eventually the
built in becomes faster. I guess all the dlm shinanigans give some
overhead.
512x512 float: fftw 0.039 s, fft 0.105 s
64x64 float: fftw 0.0013 s, fft 0.0003 s
Henry.
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