http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59439
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> --- Don't do that then ;-) Noone ever claimed std::stringstream is a good way to convert integers to strings in performance critical code. Even if the std::locale construction is optimized further, stringstream still involves far more code than necessary for a simple conversion (to handle field widths, hex output and everything else that iostreams support). std::to_string() is a better alternative in C++11, re-using an existing stringstream object is another alternative, or just use your snprintf version. There's a good reason boost::lexical_cast is special-cased for the common int-to-string conversions that don't need fancy formatting.
