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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: HG, git and others actualize the modeline when commit form the
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Date: Mon, 16 Nov 2020 21:26:25 +0200
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To: Dmitry Gutov <dgutov@yandex.ru>
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In-Reply-To: <2006f217-d87b-eb44-0918-8327044870d6@yandex.ru> (message from
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> Cc: emacs-devel@gnu.org
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Mon, 16 Nov 2020 20:43:54 +0200
> 
> > You are well advised not to use auto-revert-mode in VCS repositories.
> 
> Why not?

Because a VCS repository triggers the poorly-scalable behavior of file
notifications.  We watch directories, and in a repository some
directories see a lot of file activity unrelated to the files you
actually visit.