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Unity/Scripts/Utility/PerformanceTimer.cs

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+using System.Runtime.InteropServices;
+using System.Threading;
+using System;
+namespace BITKit
+{
+    class PerformanceTimer
+    {
+        [DllImport("Kernel32.dll")]
+        private static extern bool QueryPerformanceCounter(
+          out long lpPerformanceCount);
+
+        [DllImport("Kernel32.dll")]
+        private static extern bool QueryPerformanceFrequency(
+          out long lpFrequency);
+
+        private long startTime, stopTime;
+        private long freq;
+
+        public PerformanceTimer()
+        {
+            startTime = 0;
+            stopTime = 0;
+
+            if (QueryPerformanceFrequency(out freq) == false)
+            {
+                throw new Exception("Timer not supported.");
+            }
+        }
+
+        public void Start()
+        {
+            Thread.Sleep(0);
+            QueryPerformanceCounter(out startTime);
+        }
+
+        public void Stop()
+        {
+            QueryPerformanceCounter(out stopTime);
+        }
+
+        public double Duration
+        {
+            get
+            {
+                return (double)(stopTime - startTime) / (double)freq;
+            }
+        }
+    }
+
+}