From: Oleksandr Gavenko <gavenkoa@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 12927@debbugs.gnu.org
Subject: bug#12927: 24.2; global-hl-line-mode and "scroll-conservatively=1000" take jump up-down the text when hold DOWN key (in *info* buffer).
Date: Thu, 22 Nov 2012 00:14:15 +0200 [thread overview]
Message-ID: <87wqxezjrc.fsf@gavenkoa.example.com> (raw)
In-Reply-To: <83y5hwuhkz.fsf@gnu.org> (Eli Zaretskii's message of "Tue, 20 Nov 2012 22:47:56 +0200")
On 2012-11-20, Eli Zaretskii wrote:
>> From: Oleksandr Gavenko
>>
>> > Should be fixed in revision 110927 on the emacs-24 branch. Please
>> > test.
>>
>> I don't familiar with bzr:
>>
>> $ bzr up
>> $ bzr info -v
>> checkout of branch: bzr://bzr.savannah.gnu.org/emacs/trunk/
>> shared repository: /home/user/devel/emacs/emacs-bzr
>
> This is the trunk, not the emacs-24 branch. I committed the fix to
> the emacs-24 branch. You can wait until the changes from the branch
> are merged onto the trunk, and test then. Or you can checkout the
> branch, like so:
>
> $ cd /home/user/devel/emacs/emacs-bzr
> $ bzr branch bzr://bzr.savannah.gnu.org/emacs/emacs-24
>
I test on 'emacs-24' branch (based on your instruction) and confirm that bug
go away!
>> Also I found that "(global-hl-line-mode 1)" slow down scrolling in CC-mode
>> enabled buffers in two or more times. Do I need report a bug?
>
> No, this is expected. hl-line-mode adds itself to post-command-hook,
> and moves its overlay after each command that changes the current
> line. What this does is completely disable the redisplay
> optimizations used when only the cursor moves without any other
> changes to the text, because moving an overlay requires a thorough
> redisplay of the window, which is more expensive.
>
> The only bug report that I can think of is a feature request to move
> hl-line-mode into the display engine, because the display engine
> knowns very well where's the current line (when it decides where to
> display the cursor), and can do this highlighting better and much more
> efficiently.
OK. I would like to see hl-line-mode into the display engine. I would make
appropriate a bug report...
--
Best regards!
next prev parent reply other threads:[~2012-11-21 22:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-18 21:13 bug#12927: 24.2; global-hl-line-mode and "scroll-conservatively=1000" take jump up-down the text when hold DOWN key (in *info* buffer) Oleksandr Gavenko
2012-11-19 16:43 ` Eli Zaretskii
2012-11-20 17:46 ` Eli Zaretskii
2012-11-20 20:36 ` Oleksandr Gavenko
2012-11-20 20:47 ` Eli Zaretskii
2012-11-21 13:51 ` Stefan Monnier
2012-11-21 22:14 ` Oleksandr Gavenko [this message]
2012-11-22 3:45 ` Eli Zaretskii
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