GNU bug report logs - #73046
29.4; Emacs 100% CPU usage for several seconds when opening dired buffer over TRAMP

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From: Michael Albinus <michael.albinus <at> gmx.de>
To: Suhail Singh <suhailsingh247 <at> gmail.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 73046 <at> debbugs.gnu.org
Subject: bug#73046: 29.4; Emacs 100% CPU usage for several seconds when opening dired buffer over TRAMP
Date: Sat, 07 Sep 2024 16:22:58 +0200

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

Suhail Singh <suhailsingh247 <at> gmail.com> writes:

Hi,

> The above observations seem consistent with Michael's comments above
> regd. font-lock checks for "Broken Symbolink link" and "Symbolic link to
> a directory".  As such, if Michael's proposal below is implemented I
> believe it would be an adequate fix to the issue:
>
>>>> I believe it would be helpful to suppress these checks via a user
>>>> option. And no, the checks shouldn't be suppressed for remote
>>>> directories in general, on a fast connection they are valuable.

I gave it a try, see appended patch. There's a new user option
`dired-highlight-symlinks'. If non-nil (the default), symlinks are
highlighted the same way as now. With a nil value, they aren't.

You can switch this option on and off globally. However, it would be
better to do this host-wise. For this, we have connection-local
variables. The following code snippet in your ".emacs" switches the
option off for the remote host "remotehost".

--8<---------------cut here---------------start------------->8---
(connection-local-set-profile-variables
 'my-dired-profile
 '((dired-highlight-symlinks . nil)))

(connection-local-set-profiles
 '(:application tramp :machine "remotehost")
 'my-dired-profile)
--8<---------------cut here---------------end--------------->8---

Comments?

Best regards, Michael.

[Message part 2 (text/x-patch, attachment)]

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