[FFmpeg-devel] [PATCH 4/4] lavc/fft-test: update benchmark code

Michael Niedermayer michael at niedermayer.cc
Fri Mar 25 16:01:11 CET 2016

On Fri, Mar 25, 2016 at 03:53:29PM +0100, Michael Niedermayer wrote:
> On Thu, Mar 24, 2016 at 05:50:52PM -0700, Ganesh Ajjanagadde wrote:
> > 1. The most important change is the addition of a permute call to ensure
> > that the comparison between fftw and avfft is fair, since fftw does not
> > require the call. This is evident from the test code additions in the
> > previous commit, and also from http://www.fftw.org/benchfft/.
> So FFTW is slower than AVFFT
> but FFTW is faster than AVFFT + fft_permute ?
> or do i misunderstand ?

iam raising this question mostly because if it is so then the question
if fft_permute is actually needed becomes very relevant to the
question, which is faster

also testing the FFT in an actual mainstream codec to see the overall
speed effect would be quite interresting.


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

No human being will ever know the Truth, for even if they happen to say it
by chance, they would not even known they had done so. -- Xenophanes
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