Modern C++ Programming Cookbook

How to do it...

To measure the execution of a function, you must perform the following steps:

1. Retrieve the current moment of time using a standard clock:

        auto start = std::chrono::high_resolution_clock::now();

2. Call the function you want to measure:

        func();

3. Retrieve the current moment of time again; the difference between the two is the execution time of the function:

        auto diff = std::chrono::high_resolution_clock::now() - start;

4. Convert the difference (that is expressed in nanoseconds) to the actual resolution you are interested in:

        std::cout << std::chrono::duration<double,std::milli>(diff).count()                  << "ms" << std::endl;        std::cout << std::chrono::duration<double,std::nano>(diff).count()                  << "ns" << std::endl;

To implement this ...