iostream generally has poor performance[0]. TR 18015[1] (Technical Report on C++ Performance) lists some of the implementation challenges. [0] https://stackove

iostream generally has poor performance[0]. TR 18015[1] (Technical Report on C++ Performance) lists some of the implementation challenges. [0] https://stackoverflow.com/questions/4340396/does-the-c-standard-mandate-poor-performance-for-iostreams-or-am-i-just-deali https://stackoverflow.com/questions/4340396/does-the-c-stand... [1] http://www.open-std.org/jtc1/sc22/wg21/docs/TR18015.pdf http://www.open-std.org/jtc1/sc22/wg21/docs/TR18015.pdf