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[O] fill-paragraph running slowly in org mode


From: Sean Markan
Subject: [O] fill-paragraph running slowly in org mode
Date: Sat, 12 Jul 2014 14:18:33 -0400

Hi all,

I just upgraded to a new version of Linux/emacs/org-mode, and am finding that fill-paragraph (M-q) runs very slowly in org-mode on large files.  With about 50k lines in the buffer, fill-paragraph takes around 3 seconds even if the paragraph is only a couple lines.  (The behavior is correct, the problem is just the slowness.)  The time seems to scale linearly with the number of lines in the buffer as if the whole file is being processed during each fill-paragraph.

I have tried (setq  fill-paragraph-function nil) in an effort to use emacs' default fill function instead of org mode's, but that did not fix the problem.  When switching to text-mode the problem goes away.  I have also tried running emacs with no customizations, and the problem is still present in that case.

Things used to work fine in the versions of emacs and org-mode that I was previously using, but those were a few years old and I am not sure exactly which versions they were.  I am not using linum (I've seen that mentioned as a cause of slowness).  Output from org-submit-bug-report is below.

Any help would be appreciated!

- Sean





Emacs  : GNU Emacs 24.3.1 (i686-pc-linux-gnu, GTK+ Version 3.10.7)
 of 2014-03-07 on toyol, modified by Debian
Package: Org-mode version 8.2.7b (8.2.7b-dist @ /home/markan/software/org-8.2.7b/lisp/)

current state:
==============
(setq
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point org-babel-execute-safely-maybe)
 org-agenda-todo-ignore-scheduled t
 org-tab-first-hook '(org-hide-block-toggle-maybe org-src-native-tab-command-maybe org-babel-hide-result-toggle-maybe
                      org-babel-header-arg-expand)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers org-cycle-hide-inline-tasks org-cycle-show-empty-lines
                  org-optimize-window-after-visibility-change)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-speed-command-hook '(org-speed-command-default-hook org-babel-speed-command-hook)
 org-babel-pre-tangle-hook '(save-buffer)
 org-occur-hook '(org-first-headline-recenter)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-format-latex-options '(:foreground default :background default :scale 1.8 :html-foreground "Black" :html-background
                            "Transparent" :html-scale 1.0 :matchers ("begin" "$1" "$" "$$" "\\(" "\\["))
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-mode-hook '((lambda nil
                  (org-add-hook (quote change-major-mode-hook) (quote org-show-block-all) (quote append) (quote local)))
                 (lambda nil
                  (org-add-hook (quote change-major-mode-hook) (quote org-babel-show-result-all) (quote append) (quote local)))
                 org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-link-frame-setup '((vm . vm-visit-folder-other-frame) (gnus . gnus-other-frame) (file . find-file))
 org-from-is-user-regexp "\\<Sean Markan\\>"
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-startup-folded 'all
 org-agenda-files [REDACTED])
 org-file-apps '((auto-mode . emacs) ("\\.x?html?\\'" . default) ("\\.pdf\\'" . default))
 org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer)
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-confirm-shell-link-function 'yes-or-no-p
 )


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