GNU bug report logs - #46859
28.0.50; [PATCH]: Add option to truncate long lines in xref.el

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From: Theodor Thornhill <theo <at> thornhill.no>
To: 46859 <at> debbugs.gnu.org
Subject: bug#46859: 28.0.50; [PATCH]: Add option to truncate long lines in xref.el
Date: Mon, 01 Mar 2021 21:40:50 +0100

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

Hi!

When using the xref buffer, especially in combination with
'project-find-regexp', sometimes my projects has huge one-line
files. The simplest example of these kind of files are the minified
".js" files that are compiled. Right now I have one at 500 000 columns,
which admittedly is a lot. However, when 'project-find-regexp' searches
these files and finds a hit in one of them, the search takes a long
time. In addition, navigating the xref buffer when the results show up
also takes a long time, because of the troubles emacs has with long
lines.

Before the supplied patch, one search with 'project-find-regexp' with
ripgrep enabled takes around 3-4 seconds. With the supplied patch, the
search is almost instantaneous.

The added functionality is created to not kick in before a certain
threshold, where 500 columns seems reasonably long. Anything above that
will be truncated, but xref will still show that there was a hit.

I'm sure the patch can be improved, so please, don't hesitate to tell
me.


I consider this a great improvement, and I hope you will to§

Have a nice day,

--
Theodor Thornhill

[0001-Add-option-to-truncate-long-lines.patch (text/x-patch, attachment)]

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