Variable: vc-allow-async-diff
vc-allow-async-diff is a customizable variable defined in vc.el.gz.
Value
nil
Documentation
Non-nil to allow asynchronous diff process.
Enabling this means the buffer will be displayed before the diff is generated, and so might only say "No changes ...".
This variable was added, or its default value changed, in Emacs 31.1.
Source Code
;; Defined in /usr/src/emacs/lisp/vc/vc.el.gz
(defcustom vc-allow-async-diff nil
"Non-nil to allow asynchronous diff process.
Enabling this means the buffer will be displayed before the diff is
generated, and so might only say \"No changes ...\"."
:type '(choice (const :tag "No" nil)
(const :tag "Yes" t))
:version "31.1")