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

From: Eli Zaretskii <[email-masked]>
Date: Mon, 10 Jun 2024 15:04:18 +0300

> Cc: [email-masked]
> From: Kai Ma <[email-masked]>
> Date: Mon, 10 Jun 2024 04:14:40 +0200
> 
> 
> 
> > On Jun 10, 2024, at 00:34, Jeremy Bryant <[email-masked]> wrote:
> > 
> > Kai Ma <[email-masked]> writes:
> > 
> >>> 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 am unable to reproduce this bug.
> > 
> > Please could you specify exactly which version of Emacs you are using?
> 
> I’m using Emacs master branch (commit 7f8ded2a85d) on macOS.

Maybe this is specific to the macOS font back-end, which AFAIU is a
special one used only on macOS.