From: martin rudalics <rudalics@gmx.at>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 12867@debbugs.gnu.org
Subject: bug#12867: 24.3.50; easy-to-repro crash involving mode line
Date: Mon, 12 Nov 2012 18:31:53 +0100 [thread overview]
Message-ID: <50A13289.4050301@gmx.at> (raw)
In-Reply-To: <83obj2x218.fsf@gnu.org>
> The need to redisplay the mode line on every move of point is a killer
> of many redisplay optimizations. It is also potentially expensive by
> itself, because it requires Emacs to count lines, something that is
> not an easy operation in Emacs, which sees the buffer text as a linear
> array of characters, not a series of lines. So the display engine
> tries very hard to avoid redisplaying the mode line if it decides that
> the line number does not need to appear.
I think it would make sense to use a cache for maintaining line numbers.
martin
next prev parent reply other threads:[~2012-11-12 17:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-12 3:52 bug#12867: 24.3.50; easy-to-repro crash involving mode line Drew Adams
2012-11-12 15:40 ` Eli Zaretskii
2012-11-12 17:09 ` Drew Adams
2012-11-12 17:52 ` Eli Zaretskii
2012-11-12 18:16 ` Drew Adams
2012-11-12 18:35 ` Eli Zaretskii
2012-11-12 19:07 ` bug#12872: " Drew Adams
2012-11-12 17:31 ` martin rudalics [this message]
2012-11-12 18:19 ` Eli Zaretskii
2012-11-12 20:55 ` Stefan Monnier
2012-11-13 8:22 ` martin rudalics
2012-11-13 12:52 ` Eli Zaretskii
2012-11-13 13:50 ` martin rudalics
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