[Ffmpeg-cvslog] CVS: ffmpeg/libavcodec mpegvideo.c,1.511,1.512

[Corey Hickey]

Jan Knutar wrote:
> On Friday 24 March 2006 00:43, Diego Biurrun wrote:
>> On Thu, Mar 23, 2006 at 10:54:50PM +0100, Loren Merritt CVS wrote:
>>> Modified Files:
>>>  mpegvideo.c 
>>> Log Message:
>>> prefetch pixels for future motion compensation. 4-10% faster mpeg1/2/4.
>> Have you benchmarked FFmpeg against libmpeg2 after the change?  Would be
>> very interesting...
> 
> As would benchmarks comparing ffmpeg before prefetch, with ffmpeg after
> prefetch, on other CPUs than Loren's.

With GCC 4.0.3 and an Athlon64, I see approximately a 2.5% speedup on 
h.264 and a 1% speedup on MPEG-4. If more testing is needed I'll check 
more files and post full results this weekend.

Also, the other recent changes Loren committed gave me speed 
improvements as well. As of now, with my test file, h.264 decoding is 5% 
faster than it was before.

-Corey