>
> In my experience, most time in Tramp is spent on wire. That is, sending
> commands to the remote shell, and reading the command's output. Compared
> with this, time spent in Elisp is not so important (although any
> optimization will be appreciated as well).


Based on this, I wonder how useful/difficult it would be to add a sort of
"ping timer" to buffers that make regular use of remote commands, measuring
the delta between just before the most recent send and the following
(assuming no interleaving) recv. With that raw data, it should be
relatively easy to add things like a moving average and/or an alert for
sudden spikes.

Would this be more likely to result in a useful diagnostic or a computed
indicator that slow things are slow?

~Chad