bug#61667: 29.0.60; Failure to redisplay

[Eli Zaretskii]

> Date: Sat, 25 Feb 2023 01:34:32 +0200
> Cc: Po Lu <luangruo@yahoo.com>, 61667@debbugs.gnu.org,
>  Eli Zaretskii <eliz@gnu.org>
> From: Dmitry Gutov <dgutov@yandex.ru>
> 
> Anyway, I couldn't reproduce the problem under it either. Emacs's 
> startup was noticeably slower there as well, though. Just like under 
> Window Maker. I wonder what could be the reason for both.

Since this issue is all about timing, I'm not sure if the slower
startup somehow makes the problem disappear or be masked, similarly to
adding printfs (although the printfs effect is much better explained
by some problem with damage tracking than by timing alone).