Remote possibility: I've had issues with org-mode being slow when using linum-mode in the past:

E.g., http://stackoverflow.com/questions/5229705/emacs-org-mode-turn-off-line-numbers

So you might want to make sure that's not enabled. 


On Sun, Apr 13, 2014 at 12:49 PM, Nicolas Goaziou <n.goaziou@gmail.com> wrote:
Karl Voit <devnull@Karl-Voit.at> writes:

> However, my (long) Org-mode files with the performance issues is not
> a situation I am satisfied. Last week I presented Org-mode at a
> Linuxdays-event here in Graz and I had to apologize for all the
> weird behavior. This was somewhat embarrassing :-(

Does this happen on stable branch?

> Sure. After a couple of minutes, I C-g and this is the output:
> http://paste.grml.org/1898/

Would the following patch improve the situation?


Regards,

--
Nicolas Goaziou