Added benchmark helper

src/Helpers/BenchmarkHelper.php

@@ -0,0 +1,20 @@
+<?php
+class BenchmarkHelper
+{
+	protected static $lastTime;
+
+	public static function init()
+	{
+		self::$lastTime = microtime(true);
+	}
+
+	public static function tick()
+	{
+		$t = microtime(true);
+		$lt = self::$lastTime;
+		self::$lastTime = $t;
+		return $t - $lt;
+	}
+}
+
+BenchmarkHelper::init();