[Orgmode] moving in the agenda view is slow

[Rainer Stengele]

Hi all,

I am struggling more and more with slowness in my agenda view.
Moving from line to line with n and p is slow.
Pressing the n key for 2 seconds will result in the cursor not following every 
keypress but jumping down after 2 or 3 seconds.

I switched off all minor modes and found no improvements.
What is the agenda doing when I am moving from item to item?
Follow-mode is off.

I use about 10 org files with a total of 35.000 lines.
The slowness is true for customized agenda views as well as for default ones 
like "C-a t" (List of all todo entries).

GNU Emacs 23.1.50.1 (i386-mingw-nt5.1.2600) of 2009-11-04 on LENNART-69DE564 
(patched)
Org-mode version 7.3 (release_7.3.157.ga98a)

Rainer