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

[Noam Postavsky <npostavs@users.sourceforge.net>]

On Fri, Jul 29, 2016 at 1:46 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>> From: npostavs@users.sourceforge.net
>> Date: Thu, 28 Jul 2016 21:45:55 -0400
>> Cc: clement.pit@gmail.com, 24091@debbugs.gnu.org
>>
>> I guess we would like Emacs to hit this case:
>>
>>         /* If on another desktop, the deiconify/map may be ignored and the
>>            frame never becomes visible.  XMonad does this.
>>            Prevent an endless loop.  */
>>         if (FRAME_ICONIFIED_P (f) &&  ++tries > 100)
>>           break;
>>
>> But it seems that FRAME_ICONIFIED_P is returning false, because I see
>> that tries is never incremented.
>
> The question is: what happens if you bypass that loop and let Emacs
> proceed with startup?  Does it successfully finish the startup, or
> does it error out or crash later on?

Works fine, no crashes.

>
> If the former, we need to find a way to detect this special situation,
> and maybe bypass the loop altogether.

Hmm, not really sure where to start.