llvm-gcc-4.2/libstdc++-v3/testsuite/performance/27_io/stringbuf_overflow.cc

// Copyright (C) 2004 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

#include <sstream>
#include <testsuite_performance.h>

// libstdc++/16401 ostringstream in gcc 3.4.x very slow for big data
void test01()
{
  using namespace std;
  using namespace __gnu_test;

  time_counter time;
  resource_counter resource;

  for(unsigned n = 10000; n <= 10000000; n *= 10)
    {
      ostringstream oss;
      oss << "size = " << n; 

      ostringstream str;
      start_counters(time, resource);  
      for(unsigned i = 0; i < n; ++i)
	str << 'a';
      stop_counters(time, resource);

      report_performance(__FILE__, oss.str(), time, resource);
      clear_counters(time, resource);
    }
}

int main()
{
  test01();
  return 0;
}