[Orgmode] ido slow for outline path completion

[Samuel Wales]

ido for refiling works very well and makes refiling easier
by orders of magnitude.  Thank you Eric.  Thank you Carsten.

In org 6.14, I find that full path completion (which is the
only way that org-goto can use ido) can take 22-45 seconds
before it shows you the prompt.  This is on a 1ghz mac and
about a 300k org file with lots of nesting.

Is there a way to speed this up?  Offhand I imagine:

  - allow org-goto to limit the depth of the tree.  i do
    this for org-refile to depth 5.  this takes 3-5 seconds.
    - to achieve this i show only the basename.  is it
      possible with the full path in org-refile?
  - of course, it would be better not to have limits and do
    profiling/caching/..., but i don't know what the issues
    could be.  is it ido or org?  is it sorting?

Here are my settings for ido, goto, refile, and remember
refiling:

(ido-mode 1)
(ido-everywhere 1)
(setf ido-confirm-unique-completion t)

(setq org-completion-use-ido t)
;;slow (45 seconds before prompt shows, a week or two ago
;;2008-12-12).  but this is what i want.  would be even
;;better with uniquify type disambiguation.
(setf org-outline-path-complete-in-steps nil)

;;slow with ido 2008-12-12.  takes 22 seconds on about 300k
;;org file on 1ghz mac.  use 'outline for searching and
;;org-occur and navigation.  i prefer olpath.
(setf org-goto-interface 'outline-path-completion)
;;t does not work with making help stuff one window.  i think this
;;is moot unless for some reason you want outline.
(setf org-goto-auto-isearch nil)

;;for speed, set level to 5 and set this to nil.  for full
;;path completion, set level to be unlimited and/or set this
;;to t.
(setf org-refile-use-outline-path nil)
;;this is as slow as setting org-goto-interface to
;;olpath completion.
;;(setf org-refile-use-outline-path t)
;;i would use this functionality for both goto and refile if there
;;were a uniquify type disambiguation scheme.
;;(setf org-refile-use-outline-path 'file)
;;this is the most candidates i can handle the slowness of.  it
;;takes 5 seconds or so on about 300k org file on a 1ghz mac.
(setq org-refile-targets '((org-agenda-files . (:maxlevel . 5))))

;;can be re also.  this is for refile and remember.
(setf org-reverse-note-order t)

;;default is to use refile interface, which is what i want
;;(setf org-remember-interactive-interface ...)

Thanks.

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