Hi,

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

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

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

Cheers
Christian

On Sun, 2019-08-25 at 20:10 +0200, Milan Zamazal wrote:
> Hi, after upgrading from Org 9.1 to 9.2, org-drill has become extremely
> slow.  org-drill has never been fast, but now it stops being usable.
> Everything takes much more time than before -- running `M-x org-drill',
> both for the first time and again, responding to drill queries, moving
> over my Org file.
> 
> My org-drill Org file has over 4,000 entries and almost 50,000 lines.
> With Org 9.1, it used to be usable after running `M-x org-drill' for the
> first time in the given Emacs session; after the initial Org processing,
> I could move over the entries relatively smoothly.  But this no longer
> helps and org-drill itself is much slower too.
> 
> Is Org 9.2 no longer capable to handle (relatively) large files with a
> lot of Org properties?  Are there any tricks to speed it up?
> 
> Thanks for any advice,
> Milan
> 
>