Add the new system directory (alextselegidis#1207)

system/.htaccess

@@ -0,0 +1,6 @@
+<IfModule authz_core_module>
+	Require all denied
+</IfModule>
+<IfModule !authz_core_module>
+	Deny from all
+</IfModule>

system/core/Benchmark.php

@@ -0,0 +1,133 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2019, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package	CodeIgniter
+ * @author	EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright	Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
+ * @license	https://opensource.org/licenses/MIT	MIT License
+ * @link	https://codeigniter.com
+ * @since	Version 1.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * Benchmark Class
+ *
+ * This class enables you to mark points and calculate the time difference
+ * between them. Memory consumption can also be displayed.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Libraries
+ * @author		EllisLab Dev Team
+ * @link		https://codeigniter.com/userguide3/libraries/benchmark.html
+ */
+class CI_Benchmark {
+
+	/**
+	 * List of all benchmark markers
+	 *
+	 * @var	array
+	 */
+	public $marker = array();
+
+	/**
+	 * Set a benchmark marker
+	 *
+	 * Multiple calls to this function can be made so that several
+	 * execution points can be timed.
+	 *
+	 * @param	string	$name	Marker name
+	 * @return	void
+	 */
+	public function mark($name)
+	{
+		$this->marker[$name] = microtime(TRUE);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Elapsed time
+	 *
+	 * Calculates the time difference between two marked points.
+	 *
+	 * If the first parameter is empty this function instead returns the
+	 * {elapsed_time} pseudo-variable. This permits the full system
+	 * execution time to be shown in a template. The output class will
+	 * swap the real value for this variable.
+	 *
+	 * @param	string	$point1		A particular marked point
+	 * @param	string	$point2		A particular marked point
+	 * @param	int	$decimals	Number of decimal places
+	 *
+	 * @return	string	Calculated elapsed time on success,
+	 *			an '{elapsed_string}' if $point1 is empty
+	 *			or an empty string if $point1 is not found.
+	 */
+	public function elapsed_time($point1 = '', $point2 = '', $decimals = 4)
+	{
+		if ($point1 === '')
+		{
+			return '{elapsed_time}';
+		}
+
+		if ( ! isset($this->marker[$point1]))
+		{
+			return '';
+		}
+
+		if ( ! isset($this->marker[$point2]))
+		{
+			$this->marker[$point2] = microtime(TRUE);
+		}
+
+		return number_format($this->marker[$point2] - $this->marker[$point1], $decimals);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Memory Usage
+	 *
+	 * Simply returns the {memory_usage} marker.
+	 *
+	 * This permits it to be put it anywhere in a template
+	 * without the memory being calculated until the end.
+	 * The output class will swap the real value for this variable.
+	 *
+	 * @return	string	'{memory_usage}'
+	 */
+	public function memory_usage()
+	{
+		return '{memory_usage}';
+	}
+
+}