From: "Basil L. Contovounesios" <contovob@tcd.ie>
To: Boruch Baum <boruch_baum@gmx.com>
Cc: 45926@debbugs.gnu.org
Subject: bug#45926: Tabulated-list-mode wasteful properties
Date: Sun, 17 Jan 2021 13:40:02 +0000 [thread overview]
Message-ID: <87wnwb1y31.fsf@tcd.ie> (raw)
In-Reply-To: <20210117073252.k7f2x35lq3labahe@E15-2016.optimum.net> (Boruch Baum's message of "Sun, 17 Jan 2021 02:32:52 -0500")
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Boruch Baum <boruch_baum@gmx.com> writes:
> Tabulated lists can grow quite large. In fact, the most common use for
> the mode is the *Packages* buffer listing, which for me today clocks in
> at 5211 lines * five columns. In the case of the *Packages* buffer, Performing
>
> (buffer-substring (point) (line-end-position))
>
> on a sampling of lines yields 'PP eval' buffers of length ~500 - ~700
> characters.
>
> Most of this looks to me to be unnecessary duplicate data. In using the
> mode for my own purpose, I see that the mode is putting all data of all
> columns in an entry (row) in each and every single column, ie the size
> grows exponentially by number of columns (in my personal case, ten
> columns).
>
> This isn't breaking anything, but it looks like bad design unnecessarily
> hogging memory and filling buffers with cruft.
Are you sure the data is actually duplicated and doesn't share
structure? I evaluated that expression over the xref package, and got
the attached string. Nothing looks obviously duplicated, except for the
shared #N= and #N# structures. Also, some of the repetition of shared
structures is probably just due to how string intervals are
represented/printed.
Not that any of this is necessarily optimal, of course, but it's not
immediately alarming to me, either, unless I'm missing something.
--
Basil
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next prev parent reply other threads:[~2021-01-17 13:40 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-17 7:32 bug#45926: Tabulated-list-mode wasteful properties Boruch Baum
2021-01-17 13:40 ` Basil L. Contovounesios [this message]
2021-01-17 15:11 ` Boruch Baum
2021-01-19 5:24 ` Lars Ingebrigtsen
2021-03-12 0:52 ` Stefan Kangas
2021-03-12 2:57 ` Boruch Baum
2021-03-12 3:39 ` Stefan Kangas
2021-03-12 5:46 ` Boruch Baum
2021-03-12 11:01 ` Basil L. Contovounesios
2021-04-21 3:35 ` Stefan Kangas
2021-03-12 10:51 ` Basil L. Contovounesios
2021-04-21 4:36 ` Jean Louis
2021-04-21 4:31 ` Jean Louis
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