[FFmpeg-devel] [PATCH] h264 parallelized

Andreas Öman andreas
Fri Jun 29 10:57:50 CEST 2007


Michael Niedermayer wrote:
> Hi
> ive rerun the benchmark and the values are below to make it more clear
> svn  : 0m0.737s, 0m0.735s, 0m0.742s, 0m0.746s, 0m0.746s
> patch: 0m0.756s, 0m0.763s, 0m0.757s, 0m0.761s, 0m0.752s
> testing done with:
> time ffmpeg/ffmpeg-threadslices -i test.h264 -f null /dev/null 2>/dev/null

Uww..  bad figures indeed.
I am a bit confused why there is such a big difference since the patch
does not poke around at all in the speed critical paths of the code.
It must be some kind of cache issues or inlining changes..

On what CPU is this?

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