#ifndef BENCHMARK_HPP
#define BENCHMARK_HPP
/*!
 * \file benchmark.hpp
 *
 * Benchmark for functions in C++. Use it only in release mode.
 */

#include <iostream>
#include <functional>
#include <chrono>
#include <string>

/*!
 * \brief Benchmarks the run speed of a function.
 * \param message The message to print
 * \param func The function to be evaluated. This function have zero arguments.
 * \param compute_times Times to compute the function
 *
 * Runs the function func compute_times times and use the average time as result.
 */
template <typename F>
void evaluate_speed(const std::string &message,
                    F func,
                    int compute_times = 100) {
    auto start = std::chrono::high_resolution_clock::now();
    for (auto i = 0; i != compute_times; ++i) {
        func();
    }
    auto end = std::chrono::high_resolution_clock::now();

    auto total_time = std::chrono::duration_cast<std::chrono::milliseconds>
                      (end - start).count();

    auto average_time = static_cast<double>(total_time) / compute_times;
    std::cout << message << ": " << average_time << "ms\n";
}


#endif // BENCHMARK_HPP