On Fri, Mar 25, 2016 at 9:36 AM, Nicolas George <geo...@nsup.org> wrote: > Le sextidi 6 germinal, an CCXXIV, Ganesh Ajjanagadde a écrit : >> Depends on if it is small or not. Yes, in many codecs, FFT's are short >> length ones, e.g 512. However, on long lengths, e.g 8192+, as seen >> from the benches, there are sometimes 2x variations at the moment. > > And how much of the actual total decoding is spent in the FFT? Even a ×50 > speedup would be useless if it is for a function that never amounts to more > than 0,01% of the actual time. The FFT is probably not that negligible, but > this is not a ×50 speedup either, and I have no idea how frequent are long > lengths.
Paul had some interest in 2^17 fft's at a point. > > You often do your benchmark like that, please try to be more careful and > benchmark spans of code that are actually relevant for FFmpeg's tasks. Will keep in mind, thanks. > > Regards, > > -- > Nicolas George > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
