Re: [FFmpeg-devel] [PATCH] avcodec/mpegaudio_tablegen: more dynamic initialization speedups

On Sat, Nov 28, 2015 at 8:48 AM, Ronald S. Bultje wrote: > Hi, > > On Sat, Nov 28, 2015 at 12:46 AM, Ganesh Ajjanagadde > wrote: >> >> I personally consider this net ~ 10x and overall perf numbers sufficient >> for using dynamic initialization all the

Re: [FFmpeg-devel] [PATCH] avcodec/mpegaudio_tablegen: more dynamic initialization speedups

On Sat, Nov 28, 2015 at 7:27 AM, Ganesh Ajjanagadde wrote: > On Sat, Nov 28, 2015 at 4:41 AM, Michael Niedermayer wrote: >> On Sat, Nov 28, 2015 at 12:46:31AM -0500, Ganesh Ajjanagadde wrote: >>> This further speeds up runtime initialization, with identical

Re: [FFmpeg-devel] [PATCH] avcodec/mpegaudio_tablegen: more dynamic initialization speedups

Hi, On Sat, Nov 28, 2015 at 12:46 AM, Ganesh Ajjanagadde wrote: > I personally consider this net ~ 10x and overall perf numbers sufficient > for using dynamic initialization all the time here, especially since the > tables are large. This is a logical fallacy. By this

Re: [FFmpeg-devel] [PATCH] avcodec/mpegaudio_tablegen: more dynamic initialization speedups

On Sat, Nov 28, 2015 at 12:46:31AM -0500, Ganesh Ajjanagadde wrote: > This further speeds up runtime initialization, with identical generated > tables. > > Sample benchmark (x86-64, Haswell, GNU/Linux): > > old: > 34441423 decicycles in mpegaudio_tableinit,8192 runs, 0 skips > > new:

Re: [FFmpeg-devel] [PATCH] avcodec/mpegaudio_tablegen: more dynamic initialization speedups

On Sat, Nov 28, 2015 at 4:41 AM, Michael Niedermayer wrote: > On Sat, Nov 28, 2015 at 12:46:31AM -0500, Ganesh Ajjanagadde wrote: >> This further speeds up runtime initialization, with identical generated >> tables. >> >> Sample benchmark (x86-64, Haswell, GNU/Linux): >> >>

[FFmpeg-devel] [PATCH] avcodec/mpegaudio_tablegen: more dynamic initialization speedups

This further speeds up runtime initialization, with identical generated tables. Sample benchmark (x86-64, Haswell, GNU/Linux): old: 34441423 decicycles in mpegaudio_tableinit,8192 runs, 0 skips new: 10776291 decicycles in mpegaudio_tableinit,8192 runs, 0 skips Most low