GNU bug report logs - #25122
24.5; function describe-variable hangs on large variables

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Package: emacs;

Reported by: Boruch Baum <boruch_baum <at> gmx.com>

Date: Tue, 6 Dec 2016 02:21:02 UTC

Severity: minor

Tags: fixed, patch

Merged with 13439, 21717

Found in versions 24.4.50, 24.5

Fixed in version 26.1

Done: npostavs <at> users.sourceforge.net

Bug is archived. No further changes may be made.

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: npostavs <at> users.sourceforge.net
Cc: 25122 <at> debbugs.gnu.org, Boruch Baum <boruch_baum <at> gmx.com>, Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
Subject: bug#25122: 24.5; function describe-variable hangs on large variables
Date: Sat, 11 Mar 2017 10:33:44 -0500

> Actually, it's the indent-sexp on the whole object that takes time.
> Possibly we could sacrifice some indentation correctness if the printed
> representation is big.

Actually, I think that trying to optimize this is bound to fail: we want
*Help* to show up "instantly", so we're off by a factor of more
than 100, which seems way out of reach (unless there's really an
algorithmic problem in our code, admittedly).

I think the better way out is to do less work.  E.g. bound the total
amount printed (and replace the rest with "..." that can be expanded on
demand).


        Stefan
This bug report was last modified 8 years and 27 days ago.

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