Emacs Org-Mode: Turn off linum
emacs, emacs23, org-mode
Solution
`linum-off.el` mentioned in my quesiton has solved this. Instructions are in the file: place the file into the Emacs load-path and add `(require 'linum-off)` to ~/.emacs. This script turns off line numbering for the modes specified only. I've tested it and it works fine.
Problem
I've recently moved from `vim` to `Emacs` because I want to use `org-mode`. I opened a ~10000 line, 50kb file in `Emacs23` `Org-mode` and proceeded to add about 10 first-level headings. Performance on a quad-core with 3GB RAM in Emacs23 under Ubuntu 10.04/32bit was so slow that it was unusable. I found two threads on the `Org-mode` email list discussing this. It seems that enabling `linum` causes the slow performance. I can live without line numbers in `.org` files if I have to, but I don't want to disable line numbers for all files I edit. If I'm going to "live" in `Emacs', I'll want line numbers for all other files. How can I disable `linum` for some or all `.org` files only? Is it possible to do this if I have several files open in `Emacs` and switch between them? I found some discussion about disabling line numbers for major modes here, but there was nothing that I could implement (although the `linum-off.el` script mentioned on the page looks promising, I don't (yet) know (E)Lisp, so I can't change it as I would need). I updated `Org-mode` from version 6.21b which came with `Emacs23` to version 7.5, but it made no difference. Performance in `Emacs` GUI is so bad that the application fails to respond at all. Performance with `-nw` is "better", but still unusable.