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+// Copyright Louis Dionne 2013-2017
+// 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