Timing in an elegant way in c++

Question

I am interested in timing the execution time of a free function or a member function (template or not). Call TheFunc the function in question, its call being

Answer 1

You can do it the MatLab way. It's very old-school but simple is often good:

    tic();
    a = f(c);
    toc(); //print to stdout, or
    auto elapsed = toc(); //store in variable

tic() and toc() can work to a global variable. If that's not sufficient, you can create local variables with some macro-magic:

    tic(A);
    a = f(c);
    toc(A);