GNU bug report logs - #45926
Tabulated-list-mode wasteful properties

Previous Next

Full log

Message #25 received at 45926 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Boruch Baum <boruch_baum <at> gmx.com>
Cc: "Basil L. Contovounesios" <contovob <at> tcd.ie>,
 Lars Ingebrigtsen <larsi <at> gnus.org>, 45926 <at> debbugs.gnu.org
Subject: Re: bug#45926: Tabulated-list-mode wasteful properties
Date: Thu, 11 Mar 2021 21:39:39 -0600

Boruch Baum <boruch_baum <at> gmx.com> writes:

>> Borouch, did you have the time to look into if this data is indeed
>> shared or not?  Thanks.
>
> Oh. I thought I had done that right away ...
>
> Doing it again now. Yes. It's very simple to check for yourself. Open a
> buffer that uses the mode and evaluate from any table line ...
>
>   (buffer-substring (line-beginning-position) (line-end-position))
>
> You should be able to clearly see all the duplication. It's easiest when
> you have pretty-print set up to display the output in a dedicated
> buffer, but even without that you can isearch through the duplications.

I think the interesting question is if that data is duplicated in memory
or if these are just pointers to the same shared data.

I would try modifying this data with something like `setcdr' to see if
it updates everywhere -- if the answer yes, then this data is shared and
there is no problem here.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.