Thanks for the answer. Yes, I was aware, that the focus of iostreams was not on performance. But at least I would have some hope, that since less runtime-parsin

Thanks for the answer. Yes, I was aware, that the focus of iostreams was not on performance. But at least I would have some hope, that since less runtime-parsing would be needed (at least in standard cases), a performance benefit could arise. One of the disadvantages of printf is that even in simple cases (e.g. "%s: %d") rather much parsing is needed.