tramp speed over ssh significantly increased by cache and vc ignore

init.el

@@ -552,3 +552,10 @@
 
 ;; Use internal pin
 (setenv "GPG_AGENT_INFO" nil)
+
+;;; Tramp
+
+;; https://emacs.stackexchange.com/a/37855
+(setq remote-file-name-inhibit-cache nil)
+(setq vc-ignore-dir-regexp
+      (format "%s\\|%s" vc-ignore-dir-regexp tramp-file-name-regexp))