<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP 5.1.6 or newer
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*
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* @package CodeIgniter
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* @author ExpressionEngine Dev Team
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
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* @license http://codeigniter.com/user_guide/license.html
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* @link http://codeigniter.com
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* @since Version 1.0
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* @filesource
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*/
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// ------------------------------------------------------------------------
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/**
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* CodeIgniter Benchmark Class
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*
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* This class enables you to mark points and calculate the time difference
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* between them. Memory consumption can also be displayed.
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*
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* @package CodeIgniter
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* @subpackage Libraries
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* @category Libraries
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* @author ExpressionEngine Dev Team
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* @link http://codeigniter.com/user_guide/libraries/benchmark.html
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*/
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class CI_Benchmark {
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/**
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* List of all benchmark markers and when they were added
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*
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* @var array
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*/
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var $marker = array();
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// --------------------------------------------------------------------
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/**
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* Set a benchmark marker
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*
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* Multiple calls to this function can be made so that several
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* execution points can be timed
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*
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* @access public
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* @param string $name name of the marker
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* @return void
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*/
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function mark($name)
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{
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$this->marker[$name] = microtime();
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}
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// --------------------------------------------------------------------
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/**
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* Calculates the time difference between two marked points.
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*
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* If the first parameter is empty this function instead returns the
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* {elapsed_time} pseudo-variable. This permits the full system
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* execution time to be shown in a template. The output class will
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* swap the real value for this variable.
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*
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* @access public
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* @param string a particular marked point
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* @param string a particular marked point
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* @param integer the number of decimal places
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* @return mixed
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*/
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function elapsed_time($point1 = '', $point2 = '', $decimals = 4)
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{
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if ($point1 == '')
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{
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return '{elapsed_time}';
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}
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if ( ! isset($this->marker[$point1]))
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{
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return '';
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}
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if ( ! isset($this->marker[$point2]))
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{
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$this->marker[$point2] = microtime();
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}
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list($sm, $ss) = explode(' ', $this->marker[$point1]);
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list($em, $es) = explode(' ', $this->marker[$point2]);
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return number_format(($em + $es) - ($sm + $ss), $decimals);
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}
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// --------------------------------------------------------------------
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/**
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* Memory Usage
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*
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* This function returns the {memory_usage} pseudo-variable.
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* This permits it to be put it anywhere in a template
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* without the memory being calculated until the end.
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* The output class will swap the real value for this variable.
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*
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* @access public
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* @return string
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*/
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function memory_usage()
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{
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return '{memory_usage}';
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}
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}
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// END CI_Benchmark class
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/* End of file Benchmark.php */
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/* Location: ./system/core/Benchmark.php */
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