Mostly remove memoization of root.descendants calls. We should notice node addition/removal quickly, and we won't with this optimization.
Mostly remove memoization of root.descendants calls. We should notice node addition/removal quickly, and we won't with this optimization.

--HG--
extra : convert_revision : 998209cc6903bb0d0f14cb68ba1dd797d6eb43e7

bramd/spiel,beqabeqa473/Asra,beqabeqa473/Asra,bramd/spiel,bramd/spiel,beqabeqa473/Asra