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<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* Code Igniter
*
* An open source application development framework for PHP 4.3.2 or newer
*
* @package CodeIgniter
* @author Rick Ellis
* @copyright Copyright (c) 2006, pMachine, Inc.
* @license http://www.codeignitor.com/user_guide/license.html
* @link http://www.codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* Code Igniter 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 Rick Ellis
* @link http://www.codeigniter.com/user_guide/libraries/benchmark.html
*/
class CI_Benchmark {
var $marker = array();
// --------------------------------------------------------------------
/**
* Set a benchmark marker
*
* Multiple calls to this function can be made so that several
* execution points can be timed
*
* @access public
* @param string $name name of the marker
* @return void
*/
function mark($name)
{
$this->marker[$name] = microtime();
}
// END mark()
// --------------------------------------------------------------------
/**
* 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 the full system
* execution time to be shown in a template. The output class will
* swap the real value for this variable.
*
* @access public
* @param string a paricular marked point
* @param string a paricular marked point
* @param integer the number of decimal places
* @return mixed
*/
function elapsed_time($point1 = '', $point2 = '', $decimals = 4)
{
if ($point1 == '')
{
return '{elapsed_time}';
}
if ( ! isset($this->marker[$point2]))
$this->marker[$point2] = microtime();
list($sm, $ss) = explode(' ', $this->marker[$point1]);
list($em, $es) = explode(' ', $this->marker[$point2]);
return number_format(($em + $es) - ($sm + $ss), $decimals);
}
// END elapsed_time()
// --------------------------------------------------------------------
/**
* Auto Profiler
*
* This function cycles through the entire array of mark points and
* matches any two points that are named identially (ending in "_start"
* and "_end" respectively). It then compiles the execution times for
* all points and returns it as an array
*
* @access public
* @return array
*/
function auto_profiler()
{
$marker_keys = array_reverse(array_keys($this->marker));
$times = array();
foreach ($marker_keys as $val)
{
if (preg_match("/(.+?)_start/i", $val, $match))
{
if (isset($this->marker[$match[1].'_end']))
{
$times[$match[1]] = $this->elapsed_time($val, $match[1].'_end');
}
}
}
return $times;
}
// --------------------------------------------------------------------
/**
* Memory Usage
*
* This function returns the {memory_usage} pseudo-variable.
* 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.
*
* @access public
* @return string
*/
function memory_usage()
{
return '{memory_usage}';
}
// END memory_usage()
}
// END CI_Benchmark class
?>
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