--- /dev/null
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2011 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 <cassert>
+#include <unordered_set>
+#include <testsuite_performance.h>
+
+int main()
+{
+ using namespace __gnu_test;
+
+ time_counter time;
+ resource_counter resource;
+
+ start_counters(time, resource);
+
+ std::unordered_set<int> us;
+ for (int i = 0; i != 5000000; ++i)
+ us.insert(i);
+
+ stop_counters(time, resource);
+ report_performance(__FILE__, "Container generation", time, resource);
+
+ start_counters(time, resource);
+
+ for (int j = 100; j != 0; --j)
+ {
+ auto it = us.begin();
+ while (it != us.end())
+ {
+ if ((*it % j) == 0)
+ it = us.erase(it);
+ else
+ ++it;
+ }
+ }
+
+ stop_counters(time, resource);
+ report_performance(__FILE__, "Container erase", time, resource);
+
+ start_counters(time, resource);
+
+ us.insert(0);
+
+ for (int i = 0; i != 500; ++i)
+ {
+ auto it = us.begin();
+ ++it;
+ assert( it == us.end() );
+ }
+
+ stop_counters(time, resource);
+ report_performance(__FILE__, "Container iteration", time, resource);
+
+ return 0;
+}