[TUHS] vi in cooked mode?

[Noel Chiappa]

    > From: Diomidis Spinellis

    > I remember being told back in the 1980s that vi would set the terminal
    > to "cooked mode" when vi was in "insert mode", so as to reduce expensive
    > context switching for each character typed.
    > ...
    > However, I can't find such evidence even as far back as BSD 1.

Maybe you're thinking of Multics Emacs, which had such a capability:

  https://multicians.org/mepap.html

  Noel