From: Eli Zaretskii <eliz@gnu.org>
To: Phil Sainty <psainty@orcon.net.nz>
Cc: rpluim@gmail.com, pieter@vanoostrum.org, 38407@debbugs.gnu.org
Subject: bug#38407: 27.0.50; infinite loop with display of large file without newlines
Date: Sat, 07 Dec 2019 09:56:15 +0200 [thread overview]
Message-ID: <83muc4fu1s.fsf@gnu.org> (raw)
In-Reply-To: <a88b9df0-6228-6364-5f75-a7adc118d7f0@orcon.net.nz> (message from Phil Sainty on Sat, 7 Dec 2019 14:28:37 +1300)
> Cc: rpluim@gmail.com, pieter@vanoostrum.org, 38407@debbugs.gnu.org
> From: Phil Sainty <psainty@orcon.net.nz>
> Date: Sat, 7 Dec 2019 14:28:37 +1300
>
> > In general, searching for a newline is very fast in Emacs, so if you
> > use the right primitives, you should be able to scan quite a lot of
> > text before the time begins affecting responsiveness.
>
> `so-long-detected-long-line-p' is the provided predicate, and it
> relies on `forward-line' (which I've assumed is as quick as I'm going
> to get for finding newlines), along with narrowing to limit the amount
> of text scanned to the maximum value that we care about (i.e. the
> minimum length of a too-long line).
>
> I've just done a bit of testing with much larger files and values, and
> suspect that we could indeed make these values quite dramatically
> bigger without any noticeable impact.
Yes, I'd expect that.
Thanks.
next prev parent reply other threads:[~2019-12-07 7:56 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-27 21:52 bug#38407: 27.0.50; infinite loop with display of large file without newlines Pieter van Oostrum
2019-11-27 23:38 ` Phil Sainty
2019-11-28 0:30 ` Phil Sainty
2019-11-28 1:22 ` Phil Sainty
2019-11-28 6:51 ` Pieter van Oostrum
2019-11-28 15:14 ` Eli Zaretskii
2019-11-28 18:30 ` Pieter van Oostrum
2019-11-28 18:53 ` Eli Zaretskii
2019-11-28 22:09 ` Pieter van Oostrum
2019-11-29 7:12 ` Eli Zaretskii
2019-11-29 11:48 ` Phil Sainty
2019-11-29 13:20 ` Eli Zaretskii
2019-11-29 13:48 ` Dmitry Gutov
2019-11-29 14:26 ` Eli Zaretskii
2019-11-29 14:31 ` Dmitry Gutov
2019-11-29 15:03 ` Eli Zaretskii
2019-11-29 16:53 ` Dmitry Gutov
2019-11-29 19:28 ` Eli Zaretskii
2019-11-29 17:24 ` Pieter van Oostrum
2019-11-29 19:30 ` Eli Zaretskii
2019-11-30 8:25 ` Pieter van Oostrum
2019-12-01 7:23 ` Pieter van Oostrum
2019-12-01 10:37 ` Phil Sainty
2019-12-01 16:35 ` Pieter van Oostrum
2019-12-01 18:40 ` Pieter van Oostrum
2019-12-02 16:23 ` Eli Zaretskii
2019-12-01 17:45 ` Eli Zaretskii
2019-12-02 10:27 ` Robert Pluim
2019-12-03 11:20 ` Robert Pluim
2019-12-03 16:05 ` Eli Zaretskii
2019-12-04 9:15 ` Robert Pluim
2019-12-04 15:45 ` Eli Zaretskii
2019-12-05 7:27 ` Robert Pluim
2019-12-05 15:01 ` Eli Zaretskii
2019-12-05 20:38 ` Phil Sainty
2019-12-06 8:04 ` Eli Zaretskii
2019-12-07 1:28 ` Phil Sainty
2019-12-07 7:56 ` Eli Zaretskii [this message]
2019-11-28 15:06 ` Eli Zaretskii
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