one way is to buy a commercial profiler program :)
But the easiest way is to call clock() to get the current time before starting the algorithm, then call it again after the algorithm is finished. The difference is the execution time. But be warned that the algorithm might execute so quickly that the time is unmeasurable. In that case call the algorithm in a loop for maybe a thousand or so times.
For Each ctrl As Control In Me.Controls("pnlMainPanel").Controls
If ctrl.GetType Is GetType(System.Windows.Forms.Panel) Then
For Each subCtrl As Control In ctrl.Controls
If subCtrl.GetType Is GetType(System.Windows.Forms.TextBox) Then
If subCtrl.GetType Is ...