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[O] Re: Slow movement in large buffers

From: Matt Lundin
Subject: [O] Re: Slow movement in large buffers
Date: Thu, 17 Mar 2011 20:37:41 -0400
User-agent: Gnus/5.110014 (No Gnus v0.14) Emacs/23.3 (gnu/linux)

Bastien <address@hidden> writes:

> Matt, can you build and locally test such a file?  Then instrument
> next-line when jumping from headline 1 to 2, to 3, to 4?

I'm on the job. :)

I'll write back with an official report. Suffice it to say that my early
experiments show org-mode cruising through the examples you gave me, but
slowing considerably whenever, as you suspected, there are numerous
nested overlays.

I tried, unwisely, to create a tree consisting of 100 subtrees, each of
which contained a quote, a drawer, and 100 additional subtrees, each of
which, in turn contained a drawer. It not only took the better part of a
minute to cycle the tree, but it sent my emacs memory usage
skyrocketing. Needless to say, 10000 nested entries, each with quotes
and drawers, is an extreme case. :)


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