чт, 14 февр. 2019 г. в 02:15, Alan Third <alan@idiocy.org>:

> On Wed, Feb 13, 2019 at 06:03:51PM +0100, Lars Ingebrigtsen wrote:
> > Evgeny Zajcev <lg.zevlg@gmail.com> writes:
> >
> > > I've got multi frame image at http://lgarc.narod.ru/giphy.mp4
> > >
> > > And run next code on it:
> > >
> > >   (let ((ctime (float-time)))
> > >     (setq img (create-image "~/tmp/giphy.mp4" 'imagemagick nil :scale
> 1.0))
> > >     (insert-image img)
> > >     (cl-dotimes (index 65)
> > >       (image-show-frame img index 'nocheck)
> > >       (sit-for 0.0))
> > >     (- (float-time) ctime))
> > >   ==> 18.788017988204956
> > >
> > > 18 seconds to show every frame
> >
> > Wow, that's slow...
>
> As an aside: for some reason if you run this a second time it doesn’t
> use the already cached images from the first run, so it’s just as slow
> as that first run. I may be misunderstanding how the cache is supposed
> to work, but that doesn’t seem right to me.
>

Cache washes out really fast even if you set `image-cache-eviction-delay'
to huge value.
In my case, I want to animate 50 images simultaneously and it is not yet
possible without tweeks.

-- 
lg