[Bug libstdc++/44510] New: stream unformatted inserter is slower than formatted inserter

[liugavin at hotmail dot com]

the run times has 2 times difference( formatted one FASTER than unformatted ).
[ compile option -O3 ]

void test_stream_inserter()
{
    int a = 1111;
    std::stringstream is;
    for( unsigned int i=0; i<1024*1024*100; ++i )
      {
        void* pa = ((void*)&a);
        void** pb = &pa;
#ifdef FORMATTED
        is << pb;
        is >> pa;
#else
        is.write( (const char*)pb, sizeof(pb) );
        is.read( (char*)pb, sizeof(pb) );
#endif
      }
}


-- 
           Summary: stream unformatted inserter is slower than formatted
                    inserter
           Product: gcc
           Version: 4.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: liugavin at hotmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44510