Re: [rudalics@gmx.at: Re: jit lock sit-for provokes redisplay provokes imenu]

[David Kastrup <dak@gnu.org>]

Richard Stallman <rms@gnu.org> writes:

> This is what we're thinking of using instead of
> buffer-chars-modified-tick.  It is a smaller change and more modular;
> presuming it solves the problem well enough, it is definitely
> preferable for installation now.
>
> So, what do people think of this change?

Nothing.  Hashing is not reliable and leads to non-reproducible
isolated cases of non-working.  It will also necessitate scanning
through the entire buffer whenever imenu-update-menubar is called.

I work with text buffers corresponding to books of a 1000 pages.
Those are several Megabytes large.  Every operation which scans the
whole buffer for some reason is going to be painful.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum