Re: excessively slow image animation

[Alan Third]

On Wed, Feb 13, 2019 at 06:03:51PM +0100, Lars Ingebrigtsen wrote:
> Evgeny Zajcev <address@hidden> 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.

-- 
Alan Third