73ef4ff3
 Hu Chunming
提交三方库
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// Copyright Louis Dionne 2013-2022
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#ifndef BOOST_HANA_BENCHMARK_MEASURE_HPP
#define BOOST_HANA_BENCHMARK_MEASURE_HPP
#include <chrono>
#include <iostream>
namespace boost { namespace hana { namespace benchmark {
auto measure = [](auto f) {
constexpr auto repetitions = 500ull;
auto start = std::chrono::steady_clock::now();
for (auto i = repetitions; i > 0; --i) {
f();
}
auto stop = std::chrono::steady_clock::now();
auto time = std::chrono::duration_cast<std::chrono::duration<float>>(
(stop - start) / repetitions
);
std::cout << std::fixed;
std::cout << "[execution time: " << time.count() << "]" << std::endl;
};
}}}
#endif
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