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<?php defined('SYSPATH') OR die('No direct access allowed.');
/**
* Simple benchmarking.
*
* $Id$
*
* @package Core
* @author Kohana Team
* @copyright (c) 2007 Kohana Team
* @license http://kohanaphp.com/license.html
*/
final class Benchmark {
// Benchmark timestamps
private static $marks;
/**
* Set a benchmark start point.
*
* @param string benchmark name
* @return void
*/
public static function start($name)
{
if ( ! isset(self::$marks[$name]))
{
self::$marks[$name] = array
(
'start' => microtime(TRUE),
'stop' => FALSE,
'memory_start' => function_exists('memory_get_usage') ? memory_get_usage() : 0,
'memory_stop' => FALSE
);
}
}
/**
* Set a benchmark stop point.
*
* @param string benchmark name
* @return void
*/
public static function stop($name)
{
if (isset(self::$marks[$name]) AND self::$marks[$name]['stop'] === FALSE)
{
self::$marks[$name]['stop'] = microtime(TRUE);
self::$marks[$name]['memory_stop'] = function_exists('memory_get_usage') ? memory_get_usage() : 0;
}
}
/**
* Get the elapsed time between a start and stop.
*
* @param string benchmark name, TRUE for all
* @param integer number of decimal places to count to
* @return array
*/
public static function get($name, $decimals = 4)
{
if ($name === TRUE)
{
$times = array();
$names = array_keys(self::$marks);
foreach ($names as $name)
{
// Get each mark recursively
$times[$name] = self::get($name, $decimals);
}
// Return the array
return $times;
}
if ( ! isset(self::$marks[$name]))
return FALSE;
if (self::$marks[$name]['stop'] === FALSE)
{
// Stop the benchmark to prevent mis-matched results
self::stop($name);
}
// Return a string version of the time between the start and stop points
// Properly reading a float requires using number_format or sprintf
return array
(
'time' => number_format(self::$marks[$name]['stop'] - self::$marks[$name]['start'], $decimals),
'memory' => (self::$marks[$name]['memory_stop'] - self::$marks[$name]['memory_start'])
);
}
} // End Benchmark
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