[x264-devel] Re: MMX speed up "problem"

[shauli.rozen at gmail.com]

might it be that in very low bitrate (like 30-40k for a qcif movie) the mmx
does not give much speed up?

On 3/12/06, Mathieu Monnier <manao at melix.net> wrote:
>
> Hi,
>
> > Can it be due to the fact that I am using Intel Compiler 8 and it
> > optimize the code well
>
> No. Most optimized functions are mmxext ( aka isse ), not just plain
> mmx. Particularly, sad/satd functions are mmxext, and they account for a
> lot of time in the encoding process ( according the quality level, of
> course )
>
> Regards,
>
> Mathieu
>
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