> I upgraded my emacs 25.3 to Emacs 26.1 for window. In the emacs 25.3, it > installed the org version 8.2.10 by default, and the newer emacs 26.1 builds > with org version 9.1.9. > > When I want to open a org document(19M) with org version 9.1.9. It seems to > take long time for opening this document, the emacs seem to be paused. So I > change the emacs 26.1 to use org 8.2.10
The future promise in newer versions aren’t held back by the backwardness of backward compatibility locking you in by the ball & chain to the ankle that you have for window which is the norm.