function speed_test()
    test_struct.inc = @increase;

    var = 1;
    tic
    for some_load = 1:1e6
        var = var + 1;
    end
    toc

    var = 1;
    tic
    for some_load = 1:1e6
        var = increase(var);
    end
    toc

    test_struct.var = 1;
    tic
    for some_load = 1:1e6
        test_struct.var = test_struct.var + 1;
    end
    toc

    var = 1;
    tic
    for some_load = 1:1e6
        var = test_struct.inc(var);
    end
    toc
end

function a = increase(b)
    a = b + 1;
end

function a = increase(b)
    a = b + 1;
end


---------------------
Elapsed time is 0.003451 seconds.
Elapsed time is 0.024997 seconds.
Elapsed time is 0.248971 seconds.
Elapsed time is 1.112444 seconds.