diff --git a/library/Fiktiv/Performance.php b/library/Fiktiv/Performance.php
index 9316793..eb0546f 100644
--- a/library/Fiktiv/Performance.php
+++ b/library/Fiktiv/Performance.php
@@ -2,21 +2,36 @@
 
 class Fiktiv_Performance
 {
-
+    /**
+     * @var float
+     */
     protected static $_start  = null;
-    protected static $_end    = null;
 
+    /**
+     * @var float
+     */
+    protected static $_end = null;
+
+    /**
+     * @return void
+     */
     public static function begin()
     {
         self::$_start = microtime(true);
     }
 
+    /**
+     * @return float
+     */
     public static function end()
     {
         self::$_end = microtime(true);
-        return self::$_end - self::$_start;
+        return self::results();
     }
 
+    /**
+     * @return float
+     */
     public static function results()
     {
         return self::$_end - self::$_start;