Re: existing work on TODO items

[Richard M. Stallman]

    i noticed that any keystrokes - navigation, inserting text, etc - in
    an outline-mode buffer with a large amount of collapsed text (closed
    topics) has severely noticeable latencies.

This is a disturbing problem.  I think we need to make this case
faster, then.

What is the method that you use in allout.el and runs faster?
Is it the old selective-display method of changing \n to ^M?

I think there is no fundamental reason that overlays should not be
just as fast.  Faster, in fact, because if one overlay makes 20 lines
invisible, it can be skipped without scanning those lines at all.

I don't think we need to do this before the release.
But it is pretty important to do so.