Hi,

I'm using gvim (v.8.2) on Windows. Most of the files that I need to edit 
are stored on a remote server, but I am opening them directly as "local 
files" through a mapped network drive. Typically, it takes vim 3-5 seconds 
to open or save one of those files, which comes as no surprise to me. 
However, unfortunately, vim also responds *very* slowly whenever I try to 
change between the tabs or windows containing the buffers associated with 
files on the network drive. And, in fact, even when I'm not switching 
between the buffers, vim will sometimes hang for a few seconds seemingly 
for no reason. Why would vim exhibit these responsiveness issues? I would 
presume that the responsiveness issues arise as a result of vim trying to 
make network requests. However, I see no real need for vim to make network 
requests other than when the buffer is opened or saved, and I would like to 
know how to prevent it from doing so.

I configured vim so that all swap, backup, and undo files are stored on the 
local disk:

set directory=~/vimfiles/swp//
set backupdir=~/vimfiles/backup//
set undodir=~/vimfiles/undo//

However, I am pretty sure that one reason that vim is making network 
requests is to check whether the file on disk has changed since it was last 
loaded. And, in fact, gvim *does* spontaneously alert me when it thinks 
that file on disk has been changed by another user. So, gvim *must* be 
making network requests to do that. Now, I was under the impression that 
vim only makes these checks (before an attempt to save the file) when the 
:checktime command is run. So, I searched the output of the :autocmd 
command for any reference to the :checktime command, but I could find none.

So, why is gvim checking whether the file on disk has been changed? How do 
I stop it from doing that? And are there any other causes for network 
requests that I ought to know about?

- Aaron

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