On Sat, Sep 26, 2020 at 12:28:04PM +0200, Andreas Rheinhardt wrote: > This proved beneficial for performance: For the sample [1] the number > of decicycles in one decode call decreased from 155851561 to 108158037 > for Clang 10 and from 168270467 to 128847479 for GCC 9.3. For x86-32 > compiled with GCC 9.3 and run on an x64 Haswell the number increased > from 158405517 to 202215769, so that the cached bitstream reader is only > enabled if HAVE_FAST_64BIT is set. These values are the average of 10 > runs each looping five times over the input. > > [1]: > samples.ffmpeg.org/ffmpeg-bugs/trac/ticket2593/fraps_flv1_decoding_errors.avi > > Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@gmail.com> > --- > libavcodec/fraps.c | 3 +++ > 1 file changed, 3 insertions(+)
probably ok > > diff --git a/libavcodec/fraps.c b/libavcodec/fraps.c > index 00fd63ffec..8d01b44f11 100644 > --- a/libavcodec/fraps.c > +++ b/libavcodec/fraps.c > @@ -31,6 +31,9 @@ > * Version 2 files support by Konstantin Shishkov > */ > > +#include "config.h" > + > +#define CACHED_BITSTREAM_READER HAVE_FAST_64BIT > #define UNCHECKED_BITSTREAM_READER 1 > #include "avcodec.h" > #include "get_bits.h" > -- > 2.25.1 > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
