Comment by forgotpwd16

  74910,74912c187768,187779
  < [Example 1: If you want to use the code conversion facetcodecvt_utf8to output tocouta UTF-8 multibyte sequence
  < corresponding to a wide string, but you don't want to alter the locale forcout, you can write something like:\237 D.27.21954
                                                                                                                                \251ISO/IECN4950wstring_convert<std::codecvt_utf8<wchar_t>> myconv;
  < std::string mbstring = myconv.to_bytes\050L"Hello\134n"\051;
  ---
  >
  > [Example 1: If you want to use the code conversion facet codecvt_utf8 to output to cout a UTF-8 multibyte sequence
  > corresponding to a wide string, but you don’t want to alter the locale for cout, you can write something like:
  >
  > § D.27.2
  > 1954
  >
  > © ISO/IEC
  > N4950
  >
  > wstring_convert<std::codecvt_utf8<wchar_t>> myconv;
  > std::string mbstring = myconv.to_bytes(L"Hello\n");

Is indeed faster but output is messier. And doesn't handle Unicode in contrast to mutool that does. (Probably also explains the big speed boost.)