this post was submitted on 22 Nov 2023
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Emacs slow to open file if autosave exists (alien.top)
submitted 1 year ago by materus@alien.top to c/emacs
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As in topic, emacs normally open files in instant, but when autosave (#filename#) exists, it takes about 1 sec to open file.

Any idea how to fix this without disabling autosaves? It doesn't seem to be config problem since same happens with -Q flag.

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[–] Observerdoubletwenty@alien.top 1 points 1 year ago (1 children)

I think it could be related to after-find-file, defined in lisp/files.el.

In the version in the master branch there's a call to sit-for. Unfortunately it seems to be hard-coded with a 1 second interval, so you'll probably have to redefine this function.

[–] materus@alien.top 1 points 1 year ago (1 children)

Yes, that's it. I got answer for bug report:

"This is a feature: we let the user see the message and wait for 1 sec
after showing it, to make sure this particular message is not
immediately replaced by some others.  From after-find-file:

      (when (and warn msg)
        (message "%s" msg)
        (or not-serious (sit-for 1 t))))
                        ^^^^^^^^^^^^^
(The value of not-serious is nil in this case.)

This is not a bug."

[–] noooit@alien.top 1 points 1 year ago

Wow, this is really dumb in a single threaded event driven code base. I hope they replace with some popup or equivalent.