ceph/src/boost/libs/smart_ptr/extras/test/shared_ptr_timing_test.cpp

   1 #include <boost/config.hpp>
   2
   3 #if defined(BOOST_MSVC)
   4 #pragma warning(disable: 4786)  // identifier truncated in debug info
   5 #pragma warning(disable: 4710)  // function not inlined
   6 #pragma warning(disable: 4711)  // function selected for automatic inline expansion
   7 #pragma warning(disable: 4514)  // unreferenced inline removed
   8 #endif
   9
  10 //
  11 //  shared_ptr_timing_test.cpp - use to evaluate the impact of thread safety
  12 //
  13 //  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
  14 //
  15 // Distributed under the Boost Software License, Version 1.0. (See
  16 // accompanying file LICENSE_1_0.txt or copy at
  17 // http://www.boost.org/LICENSE_1_0.txt)
  18 //
  19
  20 #include <boost/shared_ptr.hpp>
  21 #include <iostream>
  22 #include <vector>
  23 #include <ctime>
  24
  25 int const n = 8 * 1024 * 1024;
  26
  27 int main()
  28 {
  29     using namespace std;
  30
  31     std::vector< boost::shared_ptr<int> > v;
  32     boost::shared_ptr<int> pi(new int);
  33
  34     clock_t t = clock();
  35
  36     for(int i = 0; i < n; ++i)
  37     {
  38         v.push_back(pi);
  39     }
  40
  41     t = clock() - t;
  42
  43     std::cout << static_cast<double>(t) / CLOCKS_PER_SEC << '\n';
  44
  45     return 0;
  46 }