GNU bug report logs - #72830
Big rectangular selections are slow

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Message #98 received at 72830 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Mattias Engdegård <mattias.engdegard <at> gmail.com>
Cc: Michael Heerdegen <michael_heerdegen <at> web.de>, Eli Zaretskii <eliz <at> gnu.org>,
 72830 <at> debbugs.gnu.org, Juri Linkov <juri <at> linkov.net>
Subject: Re: bug#72830: Big rectangular selections are slow
Date: Sun, 22 Sep 2024 13:37:19 -0400

> Sorry if I've lost track with your step numbering, but the problem is still
> that we extract and retain the selected text both at selection and each
> incremental modification of it.

"incremental modification" is my step 2.  And in the design, step
2 should not actually compute the content of the selection.
IOW, what you describe sounds like a plain bug.

> So the extraction needs to be delayed until either requested by the X server
> or locally by mouse-yank-primary. This means that we need to decide whether
> it would be a problem to do so, as the buffer may have changed between the
> selection and text extraction. (I think we shouldn't bother preserving
> PRIMARY data across buffer modification.)

Modifications deactivate the selection, so if we want to preserve the
selection until after modifications, that's when step 4 comes into play.


        Stefan

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