bug#61667: 29.0.60; Failure to redisplay

[Eli Zaretskii]

> Date: Sun, 26 Feb 2023 16:42:43 +0200
> Cc: luangruo@yahoo.com, 61667@debbugs.gnu.org, gregory@heytings.org
> From: Dmitry Gutov <dgutov@yandex.ru>
> 
> On 26/02/2023 15:44, Eli Zaretskii wrote:
> > from the time Emacs starts and until Emacs sends the
> > XFlush to the X server
> 
>  From the time I press 'a', right? Not from the time Emacs start.

I don't think it matters.  From the start is easier, I think.

>  > as we saw with
> printfs and trace-redisplay, the timings should be sent via pipe to a
> file, not to the screen.
> 
> I can redirect those to a file with 2>err.log, that worked before.

Yes, that will also work.