libstdc++-v3/testsuite/performance/27_io/fmtflags_manipulators.cc

   1 // Copyright (C) 2004-2014 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 <cstdlib>
  20 #include <sstream>
  21 #include <testsuite_performance.h>
  22
  23 // libstdc++/14078
  24 int main(int argc, char** argv)
  25 {
  26   using namespace std;
  27   using namespace __gnu_test;
  28
  29   time_counter time;
  30   resource_counter resource;
  31
  32   int iters = 50000000;
  33   if (argc > 1)
  34     iters = atoi(argv[1]);
  35
  36   ostringstream os_s, os_m;
  37
  38   // setf
  39   start_counters(time, resource);
  40   for (int i = 0; i < iters; ++i)
  41     {
  42       os_s.setf(ios_base::uppercase);
  43       os_s.unsetf(ios_base::uppercase);
  44     }
  45   stop_counters(time, resource);
  46   report_performance(__FILE__, "setf", time, resource);
  47   clear_counters(time, resource);
  48
  49   // manipulator
  50   start_counters(time, resource);
  51   for (int i = 0; i < iters; ++i)
  52     {
  53       os_m << uppercase;
  54       os_m << nouppercase;
  55     }
  56   stop_counters(time, resource);
  57   report_performance(__FILE__, "manipulator", time, resource);
  58
  59   return 0;
  60 }