From mboxrd@z Thu Jan  1 00:00:00 1970
From: Milan Zamazal <pdm@zamazal.org>
Subject: Re: org-drill extremely slow with Org 9.2.5
Date: Sun, 22 Sep 2019 19:57:42 +0200
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 <cdda21a9c35495707a9ec56d6bcc10873703fbf5.camel@gladbachcity.de>
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>>>>> "CH" == Christian Heinrich <com-orgmode-mailinglist@gladbachcity.de> writes:

    CH> are all your headlines folded? 

Yes.

    CH> I found that running "M-x outline-show-all" before the first
    CH> org- drill call resolves this issue for me with org 9.2 (but not
    CH> with 9.3).

Indeed, cool, thank you for the tip.

    CH> See also my analysis
    CH> https://bitbucket.org/eeeickythump/org-drill/issues/48/slow-startup

The primary problem seems to be Org regressions.  IIRC, with Org 9.3,
it's enough to make a file with several thousand folded entries having
:ID: properties and the navigation becomes extremely slow.

    CH> Are you aware of the new org-drill releases by Philipp Lord?
    CH> https://gitlab.com/phillord/org-drill

I wasn't, thank you for the pointer.  (However when I tried to install
it from MELPA, it installed a new Org with it, making it unusable.
Better to install it directly from the archive above.)

Thanks,
Milan