On 9 March 2016 at 01:02, Ronald S. Bultje <rsbul...@gmail.com> wrote:
> Hi, > > On Mon, Mar 7, 2016 at 10:48 PM, Ganesh Ajjanagadde <gajja...@gmail.com> > wrote: > > > This is ~2x faster for y not an integer on Haswell+GCC, and should > > generally be faster due to the fact that anyway powf essentially does > > this under the hood. > There's two changes here. Which gives the speedup? I don't like the second > (pow -> exp(log())) if it doesn't give a speedup (I don't see why it would, > also). > > Ronald Since the function is supposed to be inlined maybe GCC is clever enough not to have a separate branch for the case where nzslope == 2 for that particular usage of the function? Not sure though. I did see a slight speed increase just above the noise. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
