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bug#18134: 24.3; Doxygen comments trigger anomalous C++ major mode behav
From: |
Alan Mackenzie |
Subject: |
bug#18134: 24.3; Doxygen comments trigger anomalous C++ major mode behavior |
Date: |
Mon, 7 Oct 2019 18:51:35 +0000 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
Hello, Stefan.
On Mon, Oct 07, 2019 at 00:42:46 +0200, Stefan Kangas wrote:
> found 27.0.50
> thanks
> Sam Varshavchik <sam.varshavchik@gmail.com> writes:
> > I am seeing anomalous behavior in C++ major mode that's triggered by
> > long, but not excessively long -- only a few hundred lines -- Doxygen-style
> > comments.
> > Cursor navigation at the end of the Doxygen comment block in the
> > following file (just before the first typedef), and trying to add some
> > additional text there, results in 3-5 seconds' worth of delays for
> > nearly typed character.
> > Highlighting the entire Doxygen comment block: M-x indent-region takes
> > several minutes (!) with emacs consuming 100% CPU.
> [Snipped a long C++ example file here.]
> I can reproduce both issues on current master using the provided example
> file.
> 1. Editing is very slow after the Doxygen comment block.
> 2. Opening the example file under "emacs -Q", pressing C-x h TAB takes
> several minutes and sees the emacs process consume 100 % CPU (on one
> core at least).
I will be looking at this in the coming days. It is likely to take
several (or even many) days to resolve, not hours.
[ .... ]
> Best regards,
> Stefan Kangas
--
Alan Mackenzie (Nuremberg, Germany).