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bug#51734: 29.0.50; got slow

From: Ken Brown
Subject: bug#51734: 29.0.50; got slow
Date: Thu, 11 Nov 2021 13:33:55 -0500
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0

On 11/11/2021 1:11 PM, Ken Brown wrote:
On 11/11/2021 9:15 AM, Eli Zaretskii wrote:
From: Katsumi Yamaoka <yamaoka@jpl.org>
On Thu, 11 Nov 2021 10:09:30 +0200, Eli Zaretskii wrote:
Probably what I should do could be bisecting the recent commits.
That'd be best, if you can.  Thanks.

I did it and found the revision that causes this problem on at
least Cygwin-64.  That is d5bb053.

That's strange: that changeset changed just the docs, and the only
changes in code are in xwidget.c (which your build shouldn't compile)
and in keyboard.c, where the changes just remove redundant braces, and
again mostly in places that are built only when xwidgets are

I can confirm the extreme slowness on my 64-bit Cygwin system, but I don't agree with the bisection.  I still see the slowness in d5bb053^.

I just did my own bisection and found the following as the first bad commit:

commit 858868e36dbb8fe30fb5ae6a59ebb2fd123e307d
Author: Lars Ingebrigtsen <larsi@gnus.org>
Date:   Sun Nov 7 04:55:02 2021 +0100

    Actually start the alarms in atimer

    * src/atimer.c (set_alarm): Actually start both timerfd and
    alarms (attempted in 4107549a).

I haven't yet tried to figure out why.


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