Earlier quoted context omitted.
Currently (with the native-comp branch) you have to enable it in your init.el, I assume that behavior will remain. E.g.: (setq comp-speed 3)
Use comp-speed 2 for Emacs as a whole though. 3 will break some semantics of the language if I understand correctly.
Good to know, thanks! Hasn't bit me yet, but my config is fairly light.