GNU bug report logs - #16830
[Bug] 24.3.50; massive slow down in forward-line

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Message #68 received at 16830 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Antipov <antipov <at> dev.rtsoft.ru>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 16830 <at> debbugs.gnu.org
Subject: Re: Re: bug#16830: [Bug] 24.3.50; massive slow down in forward-line
Date: Mon, 17 Mar 2014 19:05:27 +0400

[Message part 1 (text/plain, inline)]

On 03/10/2014 10:58 PM, Eli Zaretskii wrote:

> It would be nice to be able to turn the cache on and off dynamically,
> depending on the actual line length of the buffer.  I tried to
> implement this, but my naive implementation didn't work well, because
> sampling of the lines tends to be extremely un-representative.  If
> someone can come up with a smarter implementation, please show it.

What if we just maintain the '\n' counter per each buffer text?
With that, finding an average line length is straightforward,
and the very basic implementation looks fairly simple; this
should be helpful in maintaining newline_cache as well.

Dmitry

[nl.patch (text/x-patch, attachment)]

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