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

   1 // Copyright (C) 2006-2024 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
  19 #include <tr1/unordered_map>
  20 #include <testsuite_performance.h>
  21
  22 typedef std::tr1::unordered_map<int, int> map_type;
  23 typedef std::tr1::unordered_map<int, map_type> matrix_type;
  24
  25 int main()
  26 {
  27   using namespace __gnu_test;
  28
  29   time_counter time;
  30   resource_counter resource;
  31
  32   const int sz = 1000;
  33
  34   matrix_type matrix;
  35
  36   start_counters(time, resource);
  37   for (int iter = 0; iter < 50; ++iter)
  38     {
  39       for (int i = 0; i < sz; ++i)
  40         {
  41           for (int j = 0; j < sz; ++j)
  42             {
  43               map_type& row = matrix[i / 4];
  44               ++row[j / 4];
  45             }
  46         }
  47     }
  48   stop_counters(time, resource);
  49   report_performance(__FILE__, "", time, resource);
  50
  51   return 0;
  52 }