[O] Scanning for duplicate IDs of whole buffer when exporting a sub-heading

[Karl Voit]

Hi!

I do have this behavior which basically prevents me from exporting
from Org-mode. When I invoke export (LaTeX, HTML, ...) of a
sub-heading within a large file, Org-mode seems to scan *all* of my
agenda files (with approximately half a Million lines) at least for
duplicate IDs.

This takes very long on my i5 machine, roughly ten minutes. During
this scan, I can't use Emacs any more because it's blocking of
course.

How can I prevent this behavior?

The current sub-heading (with no further sub-headings) does not even
have any drawer.

Thanks for any hint!

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