libstdc++-v3/testsuite/performance/27_io/ofstream_insert_int.cc

// Copyright (C) 2003-2023 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 3, 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 COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

#include <unistd.h>
#include <fstream>
#include <testsuite_performance.h>

// libstdc++/8761 poor fstream performance
int main() 
{
  using namespace std;
  using namespace __gnu_test;

  time_counter time;
  resource_counter resource;
  const int iterations = 10000000;

  ofstream out("tmp_perf_int.txt");
  start_counters(time, resource);
  for (int i = 0; i < iterations; ++i)
    out << i << "\n";
  stop_counters(time, resource);
  report_performance(__FILE__, "", time, resource);

  unlink("tmp_perf_int.txt");
  return 0;
}