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2005 Aurelien 1 
<?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 4.3.2 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, 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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	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/libraries/Benchmark.php */