[SciPy-dev] Dropping djbfft ?

David Cournapeau david@ar.media.kyoto-u.ac...
Mon May 12 20:26:25 CDT 2008


Pearu Peterson wrote:
>
> djbfft is important for applications that need only the 2^n sizes support
> and here djbfft have speed advantage over other fft implementations.
> For some of these applications the fft speed can be crusial.

Are you sure djbfft speed advantage is still true today ? When I run 
scipy.fftpack.bench, I hardly see any different between fftw3 and 
djbfft, and the current use of fftw3 is less than optimal (we can at 
least get a two fold increase with an improved design, because right 
now, we are using the worst possible plan method).

When I run the benchmarks, the only backend significantly faster than 
the other ones is the MKL.

cheers,

David


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