There is no actual async file I.O. Happening because that's not really a thing on Linux and even a Windows, it has terrible problems. So basically, it pickles the arguments and the return values and sends them over. It could be even so that the arguments are pickable, but the return value is not which obviously causes some confusion. People may be here that pickling is bad and you can have all sorts of challenges like code injection and whatnot from pickling through security stuff. This, I would think is not really subject to that because it's you calling the function directly and right. Yeah.