libstdc++-v3/testsuite/performance/23_containers/insert/unordered_map_array.cc

// Copyright (C) 2006-2014 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 <tr1/unordered_map>
#include <testsuite_performance.h>

typedef std::tr1::unordered_map<int, int> map_type;
typedef std::tr1::unordered_map<int, map_type> matrix_type;

int main()
{
  using namespace __gnu_test;

  time_counter time;
  resource_counter resource;

  const int sz = 1000;

  matrix_type matrix;

  start_counters(time, resource);
  for (int iter = 0; iter < 50; ++iter)
    {
      for (int i = 0; i < sz; ++i)
	{
	  for (int j = 0; j < sz; ++j)
	    {
	      map_type& row = matrix[i / 4];
	      ++row[j / 4];
	    }
	}
    }
  stop_counters(time, resource);
  report_performance(__FILE__, "", time, resource);

  return 0;
}