c# - How do I measure how long a function is running?

Question

I want to see how long a function is running. So I added a timer object on my form, and I came out with this code:

private int counter = 0;

// Inside button click I have:
timer = new Timer();
timer.Tick += new EventHandler(timer_Tick);
timer.Start();
Result result = new Result();
result = new GeneticAlgorithms().TabuSearch(parametersTabu, functia);
timer.Stop();

And:

private void timer_Tick(object sender, EventArgs e)
{
    counter++;
    btnTabuSearch.Text = counter.ToString();
}

But this is not counting anything. Why?

Answer 1

To avoid future problems with a timer, here is the right code:

timer = new Timer();
timer.Tick += new EventHandler(timer_Tick);
timer.Interval = 1; //set interval on 1 milliseconds
timer.Enabled = true; //start the timer
Result result = new Result();
result = new GeneticAlgorithms().TabuSearch(parametersTabu, functia);
timer.Enabled = false; //stop the timer

---

private void timer_Tick(object sender, EventArgs e)
{
   counter++;
   btnTabuSearch.Text = counter.ToString();
}

But it's the wrong aproach. You must use the Stopwatch (System.Diagnostic) class because it's a High resolution timer and the word Diagnostic says everything.

So try this:

Stopwatch timer = Stopwatch.StartNew();

Result result = new Result();
result = new GeneticAlgorithms().TabuSearch(parametersTabu, functia);

timer.Stop();  
TimeSpan timespan = timer.Elapsed;

btnTabuSearch.Text = String.Format("{0:00}:{1:00}:{2:00}", timespan.Minutes, timespan.Seconds, timespan.Milliseconds / 10);