bug#45224: 28.0.50; eww and GIFS (cpu usage shoots through the roof)

[Madhavan Krishnan]

On 2020-12-15, 06:41 +0100, Lars Ingebrigtsen <larsi@gnus.org> wrote:

> I see Emacs gradually killing more and more of the animations until
> Emacs has reached a usable state again, but it takes a while.  Perhaps
> it should be more aggressive in stopping the animations...
>
> Anyway, that's a side issue -- this should really be fixed by making the
> GIF animations faster.  I'm not sure whether there's been any work done
> on that -- it's been mentioned a few times, but possibly nobody has done
> the work?
>
> If I remember correctly, the current code will decode the entire GIF
> file for each frame, which is pretty pessimal.  The ImageMagick version
> of the animation code keeps a special cache to avoid doing all those
> decodings, so perhaps that code can be reused...

Thank you for investigating this issue, I am not entirely sure of what
the next step would be. Is there a sample code that I can refer to for
the ImageMagic version you are referring to? (to get some idea about how
it can be patched)

Regards
-- 
Madhavan Krishnan