[FFmpeg-devel] [PATCH] Optimisations for av_log2 and integer clip functions

[Reimar Döffinger]

On Thu, Jan 14, 2010 at 06:33:44AM +0300, Yuriy Kaminskiy wrote:
> On 14.01.2010 03:31, M?ns Rullg?rd wrote:
> > Michael Niedermayer <michaelni at gmx.at> writes:
> > 
> >> On Wed, Jan 13, 2010 at 05:55:26PM -0500, Jason Garrett-Glaser wrote:
> [...]
> >> If thats to easy one also could factor the question in about the speed
> >> difference actually making a difference for a file a user wants to play
> > 
> > Perhaps someone with an AMD processor could try the patch on a flac file.
> amd k8 - x2 4850e, 32bit, gcc-4.1.2, -march=pentium3 -mtune=k8
> ffmpeg-mt-20100104,
> mplayer -nocache -ao pcm:fast:nowaveheader:file=/dev/null *.flac
> before: user	0m7.140s (best of few runs)
> after:  user	0m8.085s

Is that with Michael's optimization which avoids the comparison?
Might make a relevant difference...