bug#45898: 27.1; wedged in redisplay again

[Eli Zaretskii]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Date: Fri, 1 Jul 2022 10:49:04 +0200
> Cc: monnier@iro.umontreal.ca,
>  larsi@gnus.org,
>  psainty@orcon.net.nz,
>  Emacs-hacker2018@jovi.net,
>  45898@debbugs.gnu.org
> 
> > Or (on GNU/Linux only) under 'prof' -- which doesn't require you to
> > build a special version of Emacs, and still produces detailed CPU
> > usage info.
> 
> No one will care, that's why I'm telling:
> 
> I just found a way to profile Emacs on macOS 12.4, with Apple M1 chip, using 
> Xcode 13.4.1.  Please see the attached shell script.  It seems that Gprof is 
> not supported on my platform, like GDB.
> 
> I'm not yet sure how useful/reliable and whatnot that is, but it looks 
> promising, and it doesn't require building with special compiler flags (I 
> used -g -O0).

What kind of information is this capable to display?

If it's useful, we could have this script in the repository somewhere.

Thanks.