Hi Michael,

It was outside of emacs.  SCP would trigger the cpu usage in emacs, rsync
would not (oddly).  Both "cat /dev/zero > somefile"  and "dd if=/dev/zero
of=somefile" would trigger it if somefile was in my $HOME directory, but
none of these would trigger it if I did it in, for example, $HOME/Downloads/

I am pretty sure I can reproduce this at will if you need.

- Justin

On Mon, Oct 29, 2018 at 4:27 PM Michael Albinus <michael.albinus@gmx.de>
wrote:

> Justin Van Winkle <justin.vanwinkle@gmail.com> writes:
>
> Hi Justin,
>
> > I enable global-auto-revert-mode.  I noticed that when I was scp'ing a
> > large file to my home directory, every emacs process on my machine was
> > trying to use 100% cpu.  When I stopped the file transfer, emacs would
> > go back to idle cpu usage.  I ran the emacs profiler and narrowed it
> > down to revert-buffer.  Auto revert was apparently listening for
> > changes in my home directory, even for things like file creation or
> > file modified for files emacs did not have open.
>
> How did you "scp'ing a large file"? Inside Emacs, using Tramp, or
> outside Emacs?
>
> Best regards, Michael.
>