For my org files my linum-overlays length is equal to the number of lines on the screen so perhaps there's something you can do to get better performance. I'm not sure what setting it would be, I'm running e24 with my own complicated linum-format. Scott On Thu, Oct 13, 2011 at 9:23 PM, Marcelo de Moraes Serpa < celoserpa@gmail.com> wrote: > 4328, exactly the same amount of lines I have in the file. > > > On Thu, Oct 13, 2011 at 2:07 AM, Tassilo Horn wrote: > >> Marcelo de Moraes Serpa writes: >> >> > Wow.. this worked Torsten. Thank you. I wonder why this happens... >> >> linum-mode works with overlays to embed the numbers at the beginnig of >> lines. Overlays are very flexible but not too efficient, you don't want >> to have too many of them. Looking at linum.el, it seems it already does >> pooling of overlays in order not to create one overlay for any line, but >> I'm not sure. Could you please do >> >> M-: (length linum-overlays) RET >> >> in that large org file with linum-mode enabled and say what it returns >> to satisfy my curiosity? >> >> Bye, >> Tassilo >> >> >> >