[FFmpeg-devel] FYI, noticeable decoding performance degradation

Pavel Koshevoy pkoshevoy at gmail.com
Wed Aug 14 03:23:33 CEST 2013

On 8/13/13 8:27 AM, Michael Niedermayer wrote:
> On Tue, Aug 13, 2013 at 08:16:16AM -0600, Pavel Koshevoy wrote:
>> Hi,
>> Please disregard if you are already aware of the drop in decoding speed.
>> I've pulled recent changes on master yesterday up to and including
>> bb4e1b4cf910af0de2bc884c75544603c40010cc.
>> ffplay build from a few days ago could decode a short (11 seconds,
>> 640 kb/s) AC3 file without problems on 800MHz PPC iMac, but
>> yesterdays build stutters throughout playback.
>> Please let me know if I need to provide additional info.
> can you find the commit that introduced the drop in decoding speed?

Ugh, sorry about the noise, it's my fault entirely.  I've put some 
debugging code in libavcodec/mdct.c and libavcodec/ppc/fft_altivec.c and 
forgot about it.


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