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1 | <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
2 | /** | |
3 | * CodeIgniter | |
4 | * | |
5 | * An open source application development framework for PHP 5.1.6 or newer | |
6 | * | |
7 | * @package CodeIgniter | |
8 | * @author ExpressionEngine Dev Team | |
9 | * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. | |
10 | * @license http://codeigniter.com/user_guide/license.html | |
11 | * @link http://codeigniter.com | |
12 | * @since Version 1.0 | |
13 | * @filesource | |
14 | */ | |
15 | ||
16 | // ------------------------------------------------------------------------ | |
17 | ||
18 | /** | |
19 | * CodeIgniter Benchmark Class | |
20 | * | |
21 | * This class enables you to mark points and calculate the time difference | |
22 | * between them. Memory consumption can also be displayed. | |
23 | * | |
24 | * @package CodeIgniter | |
25 | * @subpackage Libraries | |
26 | * @category Libraries | |
27 | * @author ExpressionEngine Dev Team | |
28 | * @link http://codeigniter.com/user_guide/libraries/benchmark.html | |
29 | */ | |
30 | class CI_Benchmark { | |
31 | ||
32 | /** | |
33 | * List of all benchmark markers and when they were added | |
34 | * | |
35 | * @var array | |
36 | */ | |
37 | var $marker = array(); | |
38 | ||
39 | // -------------------------------------------------------------------- | |
40 | ||
41 | /** | |
42 | * Set a benchmark marker | |
43 | * | |
44 | * Multiple calls to this function can be made so that several | |
45 | * execution points can be timed | |
46 | * | |
47 | * @access public | |
48 | * @param string $name name of the marker | |
49 | * @return void | |
50 | */ | |
51 | function mark($name) | |
52 | { | |
53 | $this->marker[$name] = microtime(); | |
54 | } | |
55 | ||
56 | // -------------------------------------------------------------------- | |
57 | ||
58 | /** | |
59 | * Calculates the time difference between two marked points. | |
60 | * | |
61 | * If the first parameter is empty this function instead returns the | |
62 | * {elapsed_time} pseudo-variable. This permits the full system | |
63 | * execution time to be shown in a template. The output class will | |
64 | * swap the real value for this variable. | |
65 | * | |
66 | * @access public | |
67 | * @param string a particular marked point | |
68 | * @param string a particular marked point | |
69 | * @param integer the number of decimal places | |
70 | * @return mixed | |
71 | */ | |
72 | function elapsed_time($point1 = '', $point2 = '', $decimals = 4) | |
73 | { | |
74 | if ($point1 == '') | |
75 | { | |
76 | return '{elapsed_time}'; | |
77 | } | |
78 | ||
79 | if ( ! isset($this->marker[$point1])) | |
80 | { | |
81 | return ''; | |
82 | } | |
83 | ||
84 | if ( ! isset($this->marker[$point2])) | |
85 | { | |
86 | $this->marker[$point2] = microtime(); | |
87 | } | |
88 | ||
89 | list($sm, $ss) = explode(' ', $this->marker[$point1]); | |
90 | list($em, $es) = explode(' ', $this->marker[$point2]); | |
91 | ||
92 | return number_format(($em + $es) - ($sm + $ss), $decimals); | |
93 | } | |
94 | ||
95 | // -------------------------------------------------------------------- | |
96 | ||
97 | /** | |
98 | * Memory Usage | |
99 | * | |
100 | * This function returns the {memory_usage} pseudo-variable. | |
101 | * This permits it to be put it anywhere in a template | |
102 | * without the memory being calculated until the end. | |
103 | * The output class will swap the real value for this variable. | |
104 | * | |
105 | * @access public | |
106 | * @return string | |
107 | */ | |
108 | function memory_usage() | |
109 | { | |
110 | return '{memory_usage}'; | |
111 | } | |
112 | ||
113 | } | |
114 | ||
115 | // END CI_Benchmark class | |
116 | ||
117 | /* End of file Benchmark.php */ | |
118 | /* Location: ./system/core/Benchmark.php */ |