>>>>> On Tue, 10 Mar 2020 09:55:06 +0100, Philipp Stephani
>>>>> <p.stepha...@gmail.com> said:
Philipp> Hi,
Philipp> I managed to speed up start-file-process for SSH by a factor of 500
Philipp> (on my machine) by enabling SSH control mode in ~/.ssh/config and
then
Philipp> just calling
Philipp> (start-process name buffer "ssh" program args).
Philipp> Such a speedup is crucial for using start-file-process for truly
Philipp> asynchronous operations that may not block, e.g., Flymake backends.
Philipp> Are there any downsides to my approach? Would if be possible to
Philipp> include it in Tramp itself?
You mean like the following? :-)
(defvar tramp-ssh-controlmaster-options nil
"Which ssh Control* arguments to use.
If it is a string, it should have the form
\"-o ControlMaster=auto -o ControlPath=\\='tramp.%%r@%%h:%%p\\='
-o ControlPersist=no\". Percent characters in the ControlPath
spec must be doubled, because the string is used as format string.
Otherwise, it will be auto-detected by Tramp, if
`tramp-use-ssh-controlmaster-options' is non-nil. The value
depends on the installed local ssh version.
The string is used in `tramp-methods'.")
