So, I've been porting my Godot2 game to Godot3,
And i realize that in Godot 3, default value to setprocess() and setprocess_input() and another function that checking every frame is set to true.
This is different from Godot 2 which if you want to activate it you must call setprocess(true) or setprocess_input(true) inside _ready().
So, is it a Bug or New Workflow for game development using Godot 3?