Accessing Objects from Systems

Hello, I was wondering if there was any overhead when accessing an object from a System in ECS. For instance, say I want to make a subsystem for dialogue that an ECS system can access, but I don't want to use components for it. Besides (obviously) the overhead baked into running the functions associated with that object, would you significantly slow down your ECS code? To clarify, I'm not talking about using monobehaviours per se, but just generic classes/objects. Thanks!

 

So the short answer is... sort of. You should be able to get away with accessing an object, or storing an instance of an object in a system and working with that, but you shouldn't instantiate objects inside the loop of a system. That will cause big slow downs. At least that's my understanding of things.