bug#29889: 27.0.50; Slow visual selection

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: Sujith <m.sujith@gmail.com>,  Eli Zaretskii <eliz@gnu.org>,
>   29889@debbugs.gnu.org
> Date: Fri, 20 May 2022 16:35:46 +0800
> 
> We could have a new value of `select-active-regions' that tells Emacs to
> set the primary selections to buffer positions if the active region is
> not temporary, thereby avoiding the unreasonably high amount of string
> consing.

What will happen if the buffer text changes between the time the
active region is defined and the time some other program requests the
selection?