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

Sturla Molden sturla.molden at gmail.com
Tue Oct 28 06:11:42 EDT 2014

David Cournapeau <cournape at gmail.com> wrote:

> The real issue with fftw (besides the license) is the need for plan
> computation, which are expensive (but are not needed for each transform).

This is not a problem if you thell FFTW to guess a plan instead of making
measurements. FFTPACK needs to set up a look-up table too.

> I made some experiments with the Bluestein transform to handle prime
> transforms on fftpack, but the precision seemed to be an issue. Maybe I
> should revive this work (if I still have it somewhere).

You have it in a branch on Github.


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