libstdc++-v3/testsuite/performance/23_containers/copy_construct/unordered_set.cc

   1 // { dg-do run { target c++11 } }
   2 // Copyright (C) 2011-2024 Free Software Foundation, Inc.
   3 //
   4 // This file is part of the GNU ISO C++ Library.  This library is free
   5 // software; you can redistribute it and/or modify it under the
   6 // terms of the GNU General Public License as published by the
   7 // Free Software Foundation; either version 3, or (at your option)
   8 // any later version.
   9
  10 // This library is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License along
  16 // with this library; see the file COPYING3.  If not see
  17 // <http://www.gnu.org/licenses/>.
  18
  19
  20 #include <unordered_set>
  21 #include <testsuite_performance.h>
  22
  23 int main()
  24 {
  25   using namespace __gnu_test;
  26
  27   time_counter time;
  28   resource_counter resource;
  29
  30   std::unordered_set<int> ref;
  31   for (int i = 0; i != 500000; ++i)
  32     ref.insert(i);
  33
  34   start_counters(time, resource);
  35
  36   for (unsigned i = 0; i < 500; ++i)
  37     std::unordered_set<int> v(ref);
  38
  39   stop_counters(time, resource);
  40   report_performance(__FILE__, "unordered_set<int> copy", time, resource);
  41
  42   return 0;
  43 }