libstdc++-v3/testsuite/performance/21_strings/copy_cons_and_dest.cc

   1 // Copyright (C) 2006-2020 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 void benchmark(long len)
  23 {
  24   using namespace std;
  25   using namespace __gnu_test;
  26
  27   time_counter time;
  28   resource_counter resource;
  29
  30   start_counters(time, resource);
  31   string a("1");
  32   for (long i = 0; i < len; ++i)
  33     {
  34       string ss1(a);
  35       string ss2(ss1);
  36       string ss3(ss2);
  37       string ss4(ss3);
  38       string ss5(ss4);
  39     }
  40   stop_counters(time, resource);
  41
  42   report_performance(__FILE__, "", time, resource);
  43   clear_counters(time, resource);
  44 }
  45
  46 int main()
  47 {
  48   benchmark(1000000);
  49   benchmark(10000000);
  50   benchmark(100000000);
  51   return 0;
  52 }