The thing is that even if you do not specify a type, you've implicitly specified the `Any` type. And type checking (which always happens at runtime, whether or

The thing is that even if you do not specify a type, you've implicitly specified the `Any` type. And type checking (which always happens at runtime, whether or not you've explicitly specified any types) will be done against that. So I'm very curious as to what code exposed a slowdown after explicit types were added.