[FFmpeg-devel] FYI, noticeable decoding performance degradation

[Pavel Koshevoy]

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.

     Pavel.