add piwik installation

www/analytics/core/Timer.php

@@ -0,0 +1,91 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik;
+
+/**
+ *
+ */
+class Timer
+{
+    private $timerStart;
+    private $memoryStart;
+
+    /**
+     * @return \Piwik\Timer
+     */
+    public function __construct()
+    {
+        $this->init();
+    }
+
+    /**
+     * @return void
+     */
+    public function init()
+    {
+        $this->timerStart = $this->getMicrotime();
+        $this->memoryStart = $this->getMemoryUsage();
+    }
+
+    /**
+     * @param int $decimals
+     * @return string
+     */
+    public function getTime($decimals = 3)
+    {
+        return number_format($this->getMicrotime() - $this->timerStart, $decimals, '.', '');
+    }
+
+    /**
+     * @param int $decimals
+     * @return string
+     */
+    public function getTimeMs($decimals = 3)
+    {
+        return number_format(1000 * ($this->getMicrotime() - $this->timerStart), $decimals, '.', '');
+    }
+
+    /**
+     * @return string
+     */
+    public function getMemoryLeak()
+    {
+        return "Memory delta: " . MetricsFormatter::getPrettySizeFromBytes($this->getMemoryUsage() - $this->memoryStart);
+    }
+
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        return "Time elapsed: " . $this->getTime() . "s";
+    }
+
+    /**
+     * @return float
+     */
+    private function getMicrotime()
+    {
+        list($micro_seconds, $seconds) = explode(" ", microtime());
+        return ((float)$micro_seconds + (float)$seconds);
+    }
+
+    /**
+     * Returns current memory usage, if available
+     *
+     * @return int
+     */
+    private function getMemoryUsage()
+    {
+        if (function_exists('memory_get_usage')) {
+            return memory_get_usage();
+        }
+        return 0;
+    }
+}