Subversion-Projekte lars-tiefland.ci

<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2017, 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 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
 * @license     http://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/user_guide/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}';
        }

}