On Fri, Jul 18, 2025 at 1:41 PM Kacper Michajlow <kaspe...@gmail.com> wrote: > > On Fri, 18 Jul 2025 at 14:14, Kieran Kunhya via ffmpeg-devel > <ffmpeg-devel@ffmpeg.org> wrote: > > > > > blackdetect8_c: 820.8 ( 1.00x) > > > blackdetect8_avx2: 219.2 ( 3.74x) > > > blackdetect16_c: 372.8 ( 1.00x) > > > blackdetect16_avx2: 201.4 ( 1.85x) > > > > > > Again, sorry for being pedantic here, but it gives the wrong > > > impression especially if you look at this from outside. > > > > Also misleading as far as I understand because GCC doesn't have > > runtime detection like FFmpeg. > > Speak of... actually GCC does have runtime detection. All you have to > do is mark the function with `target_clones` with requested > architectures and it will dispatch automatically during runtime the > best function to use. > > See for more information: > https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-target_005fclones-function-attribute
It's not as sophisticated as our runtime detection (e.g avx512 vs avx512icl which we support). Comparing C vs autovectorised code that works only on some platforms with forced compilation settings is also unfair. Kieran _______________________________________________ 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".
