Re: [FFmpeg-devel] [PATCH 2/8] avcodec/flac: add AVX2 version of the 16-bit LPC encoder

2017-11-26 Thread Rostislav Pehlivanov
On 26 November 2017 at 22:51, James Darnley wrote: > When compared to the SSE4 version, runtime is reduced by 0.5 to 20%. > After a bug fix log, long ago in e609cfd697 the 16-bit lpc encoder is > used so little that the runtime reduction is no longer correct. The > function itself is around 2 ti

[FFmpeg-devel] [PATCH 2/8] avcodec/flac: add AVX2 version of the 16-bit LPC encoder

2017-11-26 Thread James Darnley
When compared to the SSE4 version, runtime is reduced by 0.5 to 20%. After a bug fix log, long ago in e609cfd697 the 16-bit lpc encoder is used so little that the runtime reduction is no longer correct. The function itself is around 2 times faster. (As one might expect for doing twice as many sam