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From: Eli Zaretskii <eliz@gnu.org>
To: Juri Linkov <juri@linkov.net>
Cc: 56815@debbugs.gnu.org
Subject: bug#56815: 29.0.50; Isearch lazy-highlight highlights too much when truncate-lines is in effect
Date: Fri, 29 Jul 2022 08:50:02 +0300	[thread overview]
Message-ID: <83fsik8o39.fsf@gnu.org> (raw)
In-Reply-To: <865yjhc85k.fsf@mail.linkov.net> (message from Juri Linkov on Thu, 28 Jul 2022 23:08:23 +0300)

> From: Juri Linkov <juri@linkov.net>
> Cc: 56815@debbugs.gnu.org
> Date: Thu, 28 Jul 2022 23:08:23 +0300
> 
> > If isearch.el cannot find a better criterion for stopping highlighting
> > beyond some buffer position, it should at least use some reasonable
> > fixed (or customizable) limit.  Another possibility is to turn off
> > lazy-highlight by default when truncate-lines is turned on.
> >
> > This issue is related to poor Emacs performance in buffers with very
> > long lines, and its fix is essential for making Emacs more usable with
> > such buffers.
> 
> I didn't follow the new design of long lines handling.
> Does it just narrow each long truncated line?

I don't think it matters, because that narrowing is in effect only as
long as redisplay runs.  Isearch's lazy-highlight runs off a timer,
not from redisplay.

I think the main point here is that under truncate-lines, whether a
given buffer position is or isn't visible cannot be easily deduced
from just its position and the window-end position.





  reply	other threads:[~2022-07-29  5:50 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-28 17:29 bug#56815: 29.0.50; Isearch lazy-highlight highlights too much when truncate-lines is in effect Eli Zaretskii
2022-07-28 20:08 ` Juri Linkov
2022-07-29  5:50   ` Eli Zaretskii [this message]
2022-07-29 11:48     ` Lars Ingebrigtsen
2022-07-29 18:14       ` Juri Linkov
2022-07-29 18:37         ` Gregory Heytings
2022-07-29 19:02           ` Eli Zaretskii
2022-07-29 19:11             ` Gregory Heytings
2022-07-29 19:31               ` Eli Zaretskii
2022-07-29 19:36                 ` Eli Zaretskii
2022-07-29 19:52                 ` Gregory Heytings
2022-07-29 19:59                   ` Eli Zaretskii
2022-07-29 20:26                     ` Gregory Heytings
2022-07-30  5:35                       ` Eli Zaretskii
2022-07-31 19:40                       ` Juri Linkov
2022-07-31 21:21                         ` Gregory Heytings
2022-08-01 11:51                         ` Eli Zaretskii
2022-08-01 18:09                           ` Juri Linkov
2022-08-02  7:31                             ` Gregory Heytings
2022-08-02 11:10                               ` Eli Zaretskii
2022-08-14 13:53                             ` Eli Zaretskii
2022-08-21 16:32                               ` Juri Linkov
2022-08-21 17:06                                 ` Eli Zaretskii
2022-08-21 19:03                                   ` Juri Linkov
2022-08-21 19:35                                     ` Eli Zaretskii
2022-08-22  6:48                                       ` Juri Linkov
2022-08-22 11:32                                         ` Eli Zaretskii
2022-08-23  7:41                                           ` Juri Linkov
2022-08-23 12:11                                             ` Eli Zaretskii
2022-08-23 16:49                                               ` Juri Linkov
2022-08-27 19:52                                                 ` Juri Linkov
2022-08-08 17:20 ` Juri Linkov

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