[FFmpeg-devel] [PATCH] fraps: optimize pseudo-YUV to RGB conversion.
Reimar.Doeffinger at gmx.de
Sun Jan 29 17:36:33 CET 2012
On Sun, Jan 29, 2012 at 05:30:04PM +0100, Michael Niedermayer wrote:
> On Sun, Jan 29, 2012 at 03:41:54PM +0100, Reimar Döffinger wrote:
> > With gcc 4.6 this part of the code is ca. 4x faster, resulting
> > in an overall speedup of around 5% for fate-fraps-v5 sample.
> > Signed-off-by: Reimar Döffinger <Reimar.Doeffinger at gmx.de>
Pushed. A good example why you should always double-check that
the compiler is actually doing the optimization you expect it to
do (there were several multiplies in the generated asm for the
innermost loop for the original code).
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