[FFmpeg-devel] [PATCH 3/3] avcodec/utvideodec: use cached bitstream reader

[Carl Eugen Hoyos]

2018-08-23 15:35 GMT+02:00, Carl Eugen Hoyos <ceffmpeg at gmail.com>:
> 2018-08-23 15:08 GMT+02:00, Paul B Mahol <onemda at gmail.com>:
>> From 100x real-time decoding to 138x real-time decoding for 320x240
>> video.
>
> On x86_64 I get an even better improvement, on x86_32
> decoding gets slower by approximately 10%.
> Without the patch, decoding is faster on x86_32 than
> x86_64 here...

Using vanilla gcc-6.4.

clang 3.4:
5% slower with patch on x86_32
>40% faster with patch on x86_64
x86_32 again faster than x86_64 without patch.

Carl Eugen