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Common/DTS.Common/Utils/StopWatch.cs

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+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+
+namespace DTS.Common.Utils
+{
+    public class StopWatchQueue
+    {
+        private readonly Stopwatch _stopWatch;
+        private readonly Queue<long> _watchQueue;
+        private readonly string _name;
+
+        public StopWatchQueue(string name)
+        {
+            _stopWatch = new Stopwatch();
+            _watchQueue = new Queue<long>(5000);
+            _name = name;
+        }
+
+        private static double CalculateStdDev(IEnumerable<double> values)
+        {
+            double ret = 0;
+
+            var valuesArray = values as double[] ?? values.ToArray();
+            if (valuesArray.Length <= 1) return ret;
+            //Compute the Average
+            var avg = valuesArray.Average();
+
+            //Perform the Sum of (value-avg)^2
+            var sum = valuesArray.Sum(d => Math.Pow(d - avg, 2));
+
+            //Put it all together
+            ret = Math.Sqrt(sum / (valuesArray.Length - 1));
+            return ret;
+        }
+
+        ~StopWatchQueue()
+        {
+            DumpData();
+        }
+
+        public void DumpData()
+        {
+            if (_watchQueue.Count == 0)
+                return;
+            var qArray = new double[_watchQueue.Count];
+            for (var idx = 0; idx < qArray.Length; idx++)
+                qArray[idx] = Convert.ToDouble(_watchQueue.Dequeue()) / Stopwatch.Frequency * 1000D;
+            var qMax = qArray.Max();
+            var qMin = qArray.Min();
+            var qAvg = qArray.Average();
+            var qStd = CalculateStdDev(qArray);
+            var fName = _name + DateTime.Now.ToFileTime() + ".csv";
+            using (var sw = new StreamWriter(fName, false))
+            {
+                sw.WriteLine("The StopWatchQueue contains {0} entries", qArray.Length);
+                sw.WriteLine("Max={0} Min={1} Average={2} StdDev={3}", qMax, qMin, qAvg, qStd);
+                sw.WriteLine("All values in milli seconds");
+                for (var idx = 0; idx < qArray.Length; idx++)
+                    sw.WriteLine("{0},{1}", idx, qArray[idx]);
+            }
+        }
+
+        public void Start()
+        {
+            _stopWatch.Start();
+        }
+
+        public void Stop()
+        {
+            _watchQueue.Enqueue(_stopWatch.ElapsedTicks);
+            _stopWatch.Reset();
+        }
+    }
+}