[Numpy-discussion] FFTS for numpy's FFTs (was: Re: Choosing between NumPy and SciPy functions)

Charles R Harris charlesr.harris at gmail.com
Tue Oct 28 05:19:15 EDT 2014

On Tue, Oct 28, 2014 at 1:32 AM, Jerome Kieffer <Jerome.Kieffer at esrf.fr>

> On Tue, 28 Oct 2014 04:28:37 +0000
> Nathaniel Smith <njs at pobox.com> wrote:
> > It's definitely attractive. Some potential issues that might need dealing
> > with, based on a quick skim:
> In my tests, numpy's FFTPACK isn't that bad considering
> * (virtually) no extra overhead for installation
> * (virtually) no plan creation time
> * not that slower for each transformation
> Because the plan creation was taking ages with FFTw, numpy's FFTPACK was
> often faster (overall)
> Cheers,

Ondrej says that f90 fftpack (his mod) runs faster than fftw. The main
thing missing from fftpack is the handling of transform sizes that are not
products of 2,3,4,5.

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