Hi,

On Wed, May 25, 2016 at 7:38 PM, Kieran Kunhya <kier...@obe.tv> wrote:

> On Wed, 25 May 2016 at 19:37 Vittorio Giovara <vittorio.giov...@gmail.com>
> wrote:
>
> > On Wed, May 25, 2016 at 10:49 AM, Ronald S. Bultje <rsbul...@gmail.com>
> > wrote:
> > > Hi,
> > >
> > > On Wed, May 25, 2016 at 9:54 AM, Luca Barbato <lu_z...@gentoo.org>
> > wrote:
> > >
> > >> On 25/05/16 15:32, Ronald S. Bultje wrote:
> > >> > I agree, ARM 32bit results would be very interesting.
> > >>
> > >> The odroid images I have are arm64 only (and I'm still figuring out
> how
> > >> to set it up properly), if you have a fast arm32 to try you are
> welcome
> > >> to beat me at it =)
> > >
> > >
> > > Hm, sorry, x86-32 was the best I could do ;-). I can try to help by
> > finding
> > > other decoders that became slower (on x86-32) maybe? I can also try to
> > > debug why decoders that became slower, actually are slower (on x86-32 -
> > but
> > > then again you already did quite some work in that area). But I also
> kind
> > > of agree with Anton that x86-32 isn't exactly top priority (although
> > > Chromebooks...), arm32 is more interesting.
> >
> > Are there people processing dnxhd or prores on arm32?
> > If so, they should volunteer to run the benchmarks.
> >
>
> VLC on some tablets I guess.


I think this misses the point. I tested 3 decoders, and 2 were slower. It
looks like something between 10 and 100 decoders were changed. I could blow
this up and say that this suggests that there may, in fact, be a
performance problem that might significantly affect the majority of the
decoders on a significant subset of systems.

I'm not going to make that claim just yet because I feel like I don't have
enough data. But claiming that this only affects dnxhd/prores decoding on
VLC on "some tablets" misses the point. I prefer Luca's approach (thanks!)
of testing arm32, even if it takes a little bit of effort.

Ronald
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