bug#5585: 23.1.91; mark text in c++ mode is painfully slow

[Chong Yidong]

"Tomas Berggren" <Tomas.Berggren@configura.com> writes:

> Ok, not sure if this is detailed enough, please let me know otherwise.
> Unfortunately I don't know what emacs -Q meen.
>
> I start with a clean emacs and open c:/windows/notepad.exe with ctrl x
> ctrl f just to get a few thousand lines of code. The file can be saved
> as a txt-file to be sure the content is treated as text but the result
> on my machine is the same if I keep it as an executable.
>
> Then go to the top, press ctrl space to set mark, then ctrl n for new
> line and keep the n button down for 20 seconds.
>
> The result on our machines is that the marker freeze after the first
> line and the process hang for 20-30 seconds before the text is marked.

So this is nothing to do with C++ mode?

I can't reproduce this; C-n does not hang.

By `emacs -Q', I mean starting Emacs with no customizations.  If you're
on Windows, you can do this by editing command run by the Emacs
"launcher" to add a `-Q' argument.

(Please keep 5585@debbugs.gnu.org in the CC list).