RMarkdown template menu population so slow making emacs menu system unusable

[malcook]

I find poly-r-rmarkdown-templates-menu takes so long to build them menu items with the dozens of available templates (order 5 seconds, in my hands at least), and apparently has to be repopulated on every menubar selection, thus making all menus unusable.

My workaround is to redefine the menu in my init.el as follows:

(easy-menu-define poly-markdown+R-menu (list ess-mode-map
							 inferior-ess-mode-map
							 poly-markdown+r-mode-map)
	      "Menu for poly-r+markdown-mode"
	      '("RMarkdown"
		("Templates - too slow! Disabled in your init.el!"
		 ;;:active (ess-get-next-available-process "R" t)
		 :filter ignore)))

Could the results be computed once, asynchronously, and cached (possible for each different installation of R it is used with)?