libstdc++-v3/testsuite/performance/21_strings/append-2.cc

   1 // Copyright (C) 2004-2020 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 <string>
  20 #include <testsuite_performance.h>
  21
  22 // Short strings didn't grow quickly...
  23 void test01()
  24 {
  25   using namespace __gnu_test;
  26   time_counter time;
  27   resource_counter resource;
  28
  29   start_counters(time, resource);
  30   for (unsigned i = 0; i < 200000; ++i)
  31     {
  32       std::string a;
  33       for (unsigned j = 0; j < 400; ++j)
  34         a.append(1, 'x');
  35     }
  36   stop_counters(time, resource);
  37
  38   report_performance(__FILE__, "", time, resource);
  39   clear_counters(time, resource);
  40 }
  41
  42 int main()
  43 {
  44   test01();
  45   return 0;
  46 }