Measure how long a process in code takes

System.Diagnostics.Stopwatch sw;
...
private void Start()
    {
         sw = new System.Diagnostics.Stopwatch();
        sw.Start();
        ....
        sw.Stop();
        Debug.Log(operationHandle.Result.name + " took to load in Milliseconds: " + sw.Elapsed.TotalMilliseconds);
    }