boost_smart_ptr/shared_ptr_timing_test.cpp

#if defined(_MSC_VER) && !defined(__ICL) && !defined(__COMO__)
#pragma warning(disable: 4786)  // identifier truncated in debug info
#pragma warning(disable: 4710)  // function not inlined
#pragma warning(disable: 4711)  // function selected for automatic inline expansion
#pragma warning(disable: 4514)  // unreferenced inline removed
#endif

//
//  shared_ptr_timing_test.cpp - use to evaluate the impact of thread safety
//
//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
//
//  Permission to copy, use, modify, sell and distribute this software
//  is granted provided this copyright notice appears in all copies.
//  This software is provided "as is" without express or implied
//  warranty, and with no claim as to its suitability for any purpose.
//

#include <boost/shared_ptr.hpp>
#include <iostream>
#include <vector>
#include <ctime>

int const n = 8 * 1024 * 1024;

int main()
{
    std::vector< boost::shared_ptr<int> > v;
    boost::shared_ptr<int> pi(new int);

    std::clock_t t = std::clock();

    for(int i = 0; i < n; ++i)
    {
        v.push_back(pi);
    }

    t = std::clock() - t;

    std::cout << static_cast<double>(t) / CLOCKS_PER_SEC << '\n';
}