Hello, following up on this issue, I have just run into it again. I'm editing a not very large document and suddenly things slowed down, mostly but not exclusively for "next-line":
--8<---------------cut here---------------start------------->8--- next-line 18 2.1547069999 0.1197059444 previous-line 19 0.4066669999 0.0214035263 org-mode-flyspell-verify 16 5.299...e-05 3.312...e-06 --8<---------------cut here---------------end--------------->8--- This happened when I started a new source code block (gnuplot, to be exact) but didn't type in the end_src line for a while. The problem seems to be due to font-locking and it tries to font-lock the whole document initially. When I eventually get around to typing the end_src line, it font-locks correctly but things are slow thereafter. There seems to be some hysteresis loop in the code... If I kill the buffer and reload the file, everything is fine. --8<---------------cut here---------------start------------->8--- next-line 17 0.0655900000 0.0038582352 previous-line 17 0.0115249999 0.0006779411 org-mode 1 0.007178 0.007178 org-fontify-meta-lines-and-blocks 25 0.0022920000 9.168...e-05 org-set-startup-visibility 1 0.001619 0.001619 org-raise-scripts 25 0.0013889999 5.555...e-05 --8<---------------cut here---------------end--------------->8--- Dramatic difference! -- : Eric S Fraga (GnuPG: 0xC89193D8FFFCF67D) in Emacs 24.0.50.1 : using Org-mode version 7.5 (release_7.5.38.gf8c6.dirty)