#include <iostream>
#include <string>
#include <utility>
#include <time.h>

std::string func1(const std::string& arg) {
    std::string test(arg);
    return test;
}

template <typename T>
std::string func2(T&& arg) {
    std::string test(std::forward<T>(arg));
    return test;
}

void wrap1(const std::string& arg) {
    func1(arg);
}

template <typename T>
void wrap2(T&& arg) {
    func2(std::forward<T>(arg));
}

int main()
{
     auto n = 100000000;

     /// Passing rvalue
     std::cout << "Passing rvalue!" << std::endl;

     // Test const l value
     auto t = clock();
     for (int i = 0; i < n; ++i)
         wrap1(std::string("test"));
     std::cout << "const l value: " << clock() - t << std::endl;

     // Test rvalue forwarding
     t = clock();
     for (int i = 0; i < n; ++i)
         wrap2(std::string("test"));
     std::cout << "rvalue forwarding: " <<  clock() - t << std::endl;

     std::cout << "Passing lvalue!" << std::endl;

     /// Passing lvalue
     std::string arg = "test";

     // Test const l value
     t = clock();
     for (int i = 0; i < n; ++i)
         wrap1(arg);
     std::cout << "const l value: " << clock() - t << std::endl;

     // Test rvalue forwarding
     t = clock();
     for (int i = 0; i < n; ++i)
         wrap2(arg);
     std::cout << "rvalue forwarding: " << clock() - t << std::endl;

}