bug#24091: 24.5; High CPU usage at startup while hidden

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@users.sourceforge.net>
> Date: Sat, 3 Sep 2016 13:29:39 -0400
> Cc: 24091@debbugs.gnu.org, Aiken <acairncross@gmail.com>, 
>       Clément Pit--Claudel <clement.pit@gmail.com>
> 
> >> > I'd start by finding out why FRAME_ICONIFIED_P returns false.
> >>
> >> Well, it seems that's because Emacs never receives an UnmapNotify event.
> >> But that doesn't feel like I'm getting any closer to a solution...
> >
> > What events does Emacs get in that case?
> 
> Emacs is getting PropertyNotify, ConfigureNotify, MapNotify, and
> ReparentNotify events.

Does it work to turn this:

        if (FRAME_ICONIFIED_P (f) &&  ++tries > 100)
          break;

into this:

        if ((FRAME_ICONIFIED_P (f) || FRAME_VISIBLE_P (f)) &&  ++tries > 100)
          break;