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From:	Achim Gratz <Stromeko AT nexgo DOT de>
To:	cygwin AT cygwin DOT com
Subject:	Re: [ANNOUNCEMENT] emacs 27.1-1
References:	<announce DOT 20200811124856 DOT 46307-1-kbrown AT cornell DOT edu>
Date:	Sat, 15 Aug 2020 17:07:00 +0200
In-Reply-To:	<announce.20200811124856.46307-1-kbrown@cornell.edu> (Ken Brown
	via Cygwin-announce's message of "Tue, 11 Aug 2020 12:48:56 -0400")
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Ken Brown via Cygwin-announce writes:
> The following packages have been uploaded to the Cygwin distribution:
>
> * emacs-27.1-1
> * emacs-common-27.1-1
> * emacs-X11-27.1-1
> * emacs-w32-27.1-1
> * emacs-lucid-27.1-1

This release seems to have a serious performance regression when using
diff-mode on large diffs with long lines (e.g. created by comparing the
logs of two compilations), especially when combined with
toggle-truncate-lines.  Emacs becomes unresponsive with 100% CPU load
when scrolling fast, sometimes for several seconds.  The CPU time seems
to be spent in redisplay().


Regards,
Achim.
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