Re: Redisplay slower in Emacs 28 than Emacs 27

[Lars Ingebrigtsen]

Alan Third <alan@idiocy.org> writes:

> I already tried that and it absolutely killed Emacs when the toolbar
> was displayed.
>
> As far as I can tell the "!" makes no great difference to the toolbar
> images as it somehow finds a matching image in the cache anyway.

There's something very odd going on here.  I did the following:

  img = search_image_cache (f, spec, hash, foreground, background, true);
  if (img)
    printf("cached\n");
  else
    printf("uncached\n");

And then "emacs -Q", and switching between the *scratch* buffer and the
*Messages* buffer, I get:

uncached
uncached
uncached
uncached
uncached
uncached
uncached
[etc]

These are from the toolbar images.

However, when loading an image in image-mode, I get:

uncached
cached
cached
cached
cached
cached
cached

So there's something off about how the image specs are being compared in
the two cases.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no