* Node processing works on the concept of process groups.
* A node group can be inherited, run on main thread, or a sub-thread.
* Groups can be ordered.
* Process priority is now present for physics.
This is the first steps towards implementing godotengine/godot-proposals#6424.
No threading or thread guards exist yet in most of the scene code other than Node. That will have to be added later.
- reduz
98c655ec8d
- Only got the smaller improvements, and the thread safety for Node and SceneTree. I'm planning to implement a similar system, but I have a different way of doing it in mind.
