On Thu, May 9, 2013 at 9:42 AM, Christopher Sean Morrison <brl...@mac.com>wrote:
>
> On May 9, 2013, at 2:10 AM, Priit Laes <pl...@plaes.org> wrote:
>
> > Ühel kenal päeval, K, 08.05.2013 kell 08:49, kirjutas Christopher Sean
> > Morrison:
> >>
> >> Prit, I've been giving your fftw patches to BRL-CAD another review and
> >> wanted to know if you'd be willing to run a quick performance
> >> comparison? Nothing complicated, just a simple times comparison
> >> before and after.
> >
> > The problem with these patches lies actually within licensing - fftw is
> > distributed under GPL license and I discovered it too late.
>
> Ah, that is a shame.
>
> Ours could easily be turned into a stand-alone PD version but without
> identifying a modern need, it'd be busy work. My suspicion is that our lib
> is actually considerably faster than other implementations (single cpu, non
> simd), just limited in the kernel sizes it supports. But that's just a gut
> feeling based on how it's implemented.
>
> Maybe if we get back into signal processing more, we can brush the dust
> off. Thanks, Priit.
>
> Cheers!
> Sean
>
If we want to test against an external FFT library, I'd suggest trying
http://kissfft.sourceforge.net/
Perhaps the patches could be adapted to use that library?
Cheers,
CY
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