Re: X performance suffers under emacs 21.1.1

[Gerd Moellmann]

address@hidden (Kim F. Storm) writes:

> IMO, the image cache should have an upper bound to the number of
> cached entries, and some form of functionality to clean up the cache
> in case there are no (or very few) free entries.

Can you please explain why?  I tend to think that such a limit would
rarely have the ``right'' value.

[...]

> can you say something about for how long an image must stay in the
> cache for the display engine to work?

There's no requirement except that images don't get removed from under
redisplay's feet, i.e. during a redisplay.