Re: Slow Emacs response time

[David Kastrup <dak@gnu.org>]

"Jens" <jens.d.nielsen@gmail.com> writes:

> I have been experiencing really strange response times from Emacs,
> and I will be very happy with any help you might have to offer. This
> morning I started to investigate a little, and this is what I found:
> when editing a specific file the response time is ok when the
> editing is being done in the beginning of the file, but horrible
> when the editing is at the end of the file (it is about 4-500 lines
> long). Here is the strange twist, when editing another file (1300
> lines) I can _not_ reproduce this behaviour. This behaviour is only
> true for LaTeX-mode and disappears when I switch to text-mode. I
> have no idea where to hunt for the cause of this. I am running GNU
> Emacs v. 21.4.1.

It would be more interesting to know what version of AUCTeX you are
using...  It is likely a problem with syntax highlighting which you
can turn on and off with
M-x font-lock-mode RET

Maybe AUCTeX thinks that math mode starts somewhere in your document
and never ends.  Putting a %$ comment in might help.

In any case, it would be worth reporting this bug with
M-x TeX-submit-bug-report RET
if you find that you are using a recent enough version of AUCTeX.  YOu
can check with

C-h v AUCTeX-version RET

11.83 is the current one.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum