const int base = 10;

    function<int(int, int)> lambda1 = [](int i, int base)
    {
        return i * base;
    };
    total = 0;
    start = high_resolution_clock::now();
    for (int i = 0; i < num; ++i)
    {
        total += lambda1(i, base);
    }
    end = high_resolution_clock::now();
    std::cout<<"result: "<<total<<"\nlambda1 call elapsed: \t"<<duration_cast<nanoseconds>(end-start).count()<<" nanoseconds.\n"<<std::endl;

    function<int(int)> lambda2 = [base](int i)
    {
        return i*base;
    };
    total = 0;
    start = high_resolution_clock::now();
    for (int i = 0; i < num; ++i)
    {
        total += lambda2(i);
    }
    end = high_resolution_clock::now();
    std::cout<<"result: "<<total<<"\nlambda2 call elapsed: \t"<<duration_cast<nanoseconds>(end-start).count()<<" nanoseconds.\n"<<std::endl;

/*result: 4995000
lambda1 call elapsed: 	4006 nanoseconds.

result: 4995000
lambda2 call elapsed: 	3737 nanoseconds.*/