old-autovect-branch/libstdc++-v3/testsuite/performance/21_strings/string_append_2.cc

   1 // Copyright (C) 2004 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 2, 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 COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 // As a special exception, you may use this file as part of a free software
  20 // library without restriction.  Specifically, if other files instantiate
  21 // templates or use macros or inline functions from this file, or you compile
  22 // this file and link it with other files to produce an executable, this
  23 // file does not by itself cause the resulting executable to be covered by
  24 // the GNU General Public License.  This exception does not however
  25 // invalidate any other reasons why the executable file might be covered by
  26 // the GNU General Public License.
  27
  28 #include <string>
  29 #include <testsuite_performance.h>
  30
  31 // Short strings didn't grow quickly...
  32 void test01()
  33 {
  34   using namespace __gnu_test;
  35   time_counter time;
  36   resource_counter resource;
  37
  38   start_counters(time, resource);
  39   for (unsigned i = 0; i < 200000; ++i)
  40     {
  41       std::string a;
  42       for (unsigned j = 0; j < 400; ++j)
  43         a.append(1, 'x');
  44     }
  45   stop_counters(time, resource);
  46
  47   report_performance(__FILE__, "", time, resource);
  48   clear_counters(time, resource);
  49 }
  50
  51 int main()
  52 {
  53   test01();
  54   return 0;
  55 }