My entire experience with Unity is "my kid said it took long to run the game he was trying to make". Sorry that I can't be more helpful. He might've been unreasonably impatient, I never looked over his shoulder when he was trying out Unity. All I know is that he says he likes Godot way more, in no small part because it's "faster" (and I'm pretty sure he doesn't mean engine performance when he says "faster").