[FFmpeg-devel] [PATCH v2 1/2] avfilter/vf_blackdetect: add AVX2 SIMD version

[Kacper Michajlow]

On Fri, 18 Jul 2025 at 14:14, Kieran Kunhya via ffmpeg-devel
<ffmpeg-devel at 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.

It's not misleading if you say in the commit description (or anywhere)
what you are comparing against. Nice of you to conveniently strip this
part from my email.

> march=core-avx2 -ftree-vectorize:

I know it's good publicity to say something is 100x faster. Though,
I'm looking at this from a technical point of view, not the Twitter
point of view.

- Kacper