[FFmpeg-devel] [PATCH] configure: enable runtime cpu detect by default.

Michael Niedermayer michaelni at gmx.at
Fri Sep 21 21:23:05 CEST 2012

On Fri, Sep 21, 2012 at 12:59:48PM -0400, Derek Buitenhuis wrote:
> On 21/09/2012 12:39 PM, Ronald S. Bultje wrote:
> > Can't you fix libpostproc to enforce runtime cpu detection and remove
> > the non-runtime cpu detect code? In practice, for x86, there is almost
> > no conceivable reason to not use runtime cpu detection. Thus, offering
> > such an option is kind of like offering an option to shoot yourself in
> > the foot.
> http://ffmpeg.org/pipermail/ffmpeg-devel/2012-September/130690.html

Btw, libpostproc build 47% faster with runtime cpudetect disabled,
its filesize decreases from 499k to 290k (with debug symbols)
162k to 93k (without debug symbols)

Tested with gcc 4.6.3


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The misfortune of the wise is better than the prosperity of the fool.
-- Epicurus
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