Subject: Re: bug#71454: 30.0.50; Performance issues with font selection

From: Kai Ma <[email-masked]>
Date: Mon, 10 Jun 2024 14:35:50 +0200

> On Jun 10, 2024, at 13:55, Eli Zaretskii <[email-masked]> wrote:
> 
>> Cc: [email-masked]
>> From: Kai Ma <[email-masked]>
>> Date: Mon, 10 Jun 2024 00:17:55 +0200
>> 
>> 
>>> On Jun 10, 2024, at 00:10, Jeremy Bryant <[email-masked]> wrote:
>>> 
>>> Would you be able to provide a self-contained series of steps starting
>>> from emacs -Q?
>> 
>> On my machine it is extremely easy to reproduce by simply:
>> 
>> 1. emacs -Q
>> 2. Switch to *scratch*
>> 3. Copy the provided text into *scratch*
>> 4. Emacs will freeze for 17 seconds or so, and it cannot be interrupted by C-g
> 
> I cannot reproduce this, I get an almost instantaneous redisplay with
> those characters.
> 
> When your Emacs eventually displays the text, how many characters are
> shown as boxes with hex code, and which ones are those?

None are hex code here. They eventually get displayed, but it takes a long time.