51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
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// Copyright (C) 2009-2012 Lorenzo Caminiti
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// Distributed under the Boost Software License, Version 1.0
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// (see accompanying file LICENSE_1_0.txt or a copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// Home at http://www.boost.org/libs/local_function
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#include <boost/chrono.hpp>
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#include <vector>
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#include <algorithm>
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#include <iostream>
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#include "profile_helpers.hpp"
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int main(int argc, char* argv[]) {
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unsigned long size = 0, trials = 0;
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profile::args(argc, argv, size, trials);
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double sum = 0.0;
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int factor = 1;
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boost::chrono::system_clock::time_point start =
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boost::chrono::system_clock::now();
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struct local_add {
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local_add(double& _sum, const int& _factor):
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sum(_sum), factor(_factor) {}
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inline void operator()(const double& num) {
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sum += factor * num;
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}
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private:
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double& sum;
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const int& factor;
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} add(sum, factor);
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boost::chrono::duration<double> decl_sec =
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boost::chrono::system_clock::now() - start;
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std::vector<double> v(size);
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std::fill(v.begin(), v.end(), 1.0);
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boost::chrono::duration<double> trials_sec;
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for(unsigned long i = 0; i < trials; ++i) {
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boost::chrono::system_clock::time_point start =
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boost::chrono::system_clock::now();
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for(unsigned long j = 0; j < v.size(); ++j) add(v[j]); // No for_each.
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trials_sec += boost::chrono::system_clock::now() - start;
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}
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profile::display(size, trials, sum, trials_sec.count(), decl_sec.count());
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return 0;
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}
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