>> + zfill-org-paragraph-boundary                                  7,240
0%
> What is that, if I may ask?

That's in my `zfill-mode' based on `refill-mode', and the function is part
of
the machinery to handle the automatic refilling of org paragraph.

> + ac-handle-post-command                                         2985  56%
> + timer-event-handler                                            1786  33%
> + redisplay_internal (C function)                                 131   2%
[...]

> So I suspected the `auto-complete'. I tried M-x auto-complete to turn it
off
> which worked, the typing was fast again. M-x auto-complete to turn it
back on
> and typing became extremely slow again.

> Indeed. auto-complete developers may be interested in your report. This
is not
> an Org bug, though.

Yes, it is highly possible to be a bug in `auto-complete' and I will report
it
to the `auto-complete' developers as soon as I get a bit more time. And I
totally understand if you decide not to spend time on this until I can
further
prove that this is still an org-mode problem. However, I think it might be
too
early to draw the conclusion at this point that this has nothing to do with
org-mode. This is because `auto-complete' started to manifest the problem
after
doing a bunch of org-mode specific operations, more specifically, after
running
`org-drlll' on 8 `org-mode' buffers, which suggested the possibility of the
leftover side effect introduced by org-mode operations. And the problem
could be
in `org-drlll', but also very possibly be in org-mode core because
`org-drlll'
uses the APIs provided by `org-mode' core.

Anyways, the other one I reported yesterday seemed to be related to
org-element
cache stuff and I will follow your suggestion to try to reproduce it. But I
may
not have much time this week anymore. Will definitely try it this weekend
for
sure.

Regards,

York