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bug#38644: 26.3; emacs uses 100% CPU with auto-revert-mode
From: |
Mattias Engdegård |
Subject: |
bug#38644: 26.3; emacs uses 100% CPU with auto-revert-mode |
Date: |
Sun, 5 Jan 2020 20:57:42 +0100 |
5 jan. 2020 kl. 20.31 skrev Peter Ludemann <peter.ludemann@gmail.com>:
> Which version of Emacs would you like me to try this with? And what result
> are you expecting/hoping to see? (e.g., might it reduce the current 30-80%
> CPU load for polling with emacs 28.0.50?) There are only a few open files
> directly under /tmp, so would this have any effect or does it propagate down
> to subdirectories?
>
> [Also, I'd need a few more details (not being an emacs-internals person) ...
> should I add this to my .emacs and restart, or execute in a scratch buffer,
> or ...?]
'auto-revert-avoid-polling' is a single global customisable variable, so you
would set it using
M-x customise-variable RET auto-revert-avoid-polling RET
, then turn it on and apply the change. I believe it was introduced in Emacs 27.
The idea is to save CPU by not having to look at files periodically to see if
they have changed. I have no idea if you would see any improvement at all, but
it shouldn't make anything worse.