[Ffmpeg-devel] VP3/Theora Perfection

Balatoni Denes dbalatoni
Tue May 17 19:11:48 CEST 2005


2005. m?jus 17. 18.25-kor Rich Felker ezeket a bolcs gondolatokat fogalmazta 
> On Tue, May 17, 2005 at 01:55:52PM +0200, Michael Niedermayer wrote:
> > you dont seem to be aware that jump tables with unpredictable jump
> > targets are very slow
> Indeed. I once measured it as 110-190 cycles on my k6, and it's
> probably worse on newer intel cpus, although better but still bad on
> amd.

Yes. In fact, I wrote the vorbis decoder while timing a mispredicted branch on 
my p4.

> Rich


- Use the Source Luke ! -

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