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

   1 // Copyright (C) 2003-2014 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 #include <unistd.h>
  19 #include <fstream>
  20 #include <testsuite_performance.h>
  21
  22 // libstdc++/8761 poor fstream performance
  23 int main()
  24 {
  25   using namespace std;
  26   using namespace __gnu_test;
  27
  28   time_counter time;
  29   resource_counter resource;
  30   const int iterations = 10000000;
  31
  32   ofstream out("tmp_perf_int.txt");
  33   start_counters(time, resource);
  34   for (int i = 0; i < iterations; ++i)
  35     out << i << "\n";
  36   stop_counters(time, resource);
  37   report_performance(__FILE__, "", time, resource);
  38
  39   unlink("tmp_perf_int.txt");
  40   return 0;
  41 }