Ok, maybe this will help....I am guessing it is .net.
Dim stpWatchInfo As New System.Diagnostics.Stopwatch 'place this in the global decoration area
stpWatchInfo.Start()'place this in the loop beginning
'place the following right after the loop is done
dim tmr as long' just a variable to hold the amount of time it took
tmr = stpWatchInfo.Elapsed.TotalSeconds 'this is the number of seconds the loop took
tmr = stpWatchInfo.Elapsed.TotalMilliseconds 'this is the number of milliseconds the loop took
Keep in mind the stopwatch will slow down your loop by a small amount of time. This should give you a baseline of how long the loop is taking.