Re: A certain unicode character makes -git Emacs eat all the CPU and become very slow.

[Vladimir Nikishkin <lockywolf@gmail.com>]

Okay, I have had some progress.

The font that causes Emacs to misbehave is AdobeBlank, often shipped
in the "Google Fonts" (not Google Noto) package.

It does not have to be used for display, it is its presence that makes
Emacs cog a core.

That "Blank" font covers all of Unicode, but every glyph is an empty
picture. I guess it is designed for the situations when there may be
symbols from out of the installed range, but when displaying "tofu" is
not desired, say, on public displays.

But in any case, it is a fairly standard, widespread font. I don't
think Emacs should behave like this in its presence.

On Thu, 5 May 2022 at 18:47, Po Lu <luangruo@yahoo.com> wrote:
>
> Vladimir Nikishkin <lockywolf@gmail.com> writes:
>
> > I have rebuilt Emacs without pgtk, and to the same effect. :(
>
> Too bad, I can't see anything wrong in the font log either.  I'm at a
> loss.  Try uninstalling fonts from your system one-by-one, and see when
> the problem goes away.
>
> Thanks.



-- 
Yours sincerely, Vladimir Nikishkin
(Sent from GMail web interface.)