fix #185. Loading index cache on startup.

Wox.Infrastructure/Timeit.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+
+namespace Wox.Infrastructure
+{
+    public class Timeit : IDisposable
+    {
+        private Stopwatch stopwatch = new Stopwatch();
+        private string name;
+
+        public Timeit(string name)
+        {
+            this.name = name;
+            stopwatch.Start();
+        }
+
+        public void Dispose()
+        {
+            stopwatch.Stop();
+            Debug.WriteLine(name + ":" + stopwatch.ElapsedMilliseconds + "ms");
+        }
+    }
+}