1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
<?php
/*
** ZABBIX
** Copyright (C) 2000-2005 SIA Zabbix
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**/
/* SPEED Measurement
-= slow =-
vs
-= fast =-
1)strlen
if (strlen($foo) < 5) { echo "Foo is too short"; }
vs
if (!isset($foo{5})) { echo "Foo is too short"; }
2)++
$i++
vs
++$i
3)print
print
vs
echo
4)regexps
preg_match("![0-9]+!", $foo);
vs
ctype_digit($foo);
5)in_array
$keys = array("apples", "oranges", "mangoes", "tomatoes", "pickles");
if (in_array('mangoes', $keys)) { ... }
vs
$keys = array("apples" => 1, "oranges" => 1, "mangoes" => 1, "tomatoes" => 1, "pickles" => 1);
if (isset($keys['mangoes'])) { ... }
6)key_exist
if(array_key_exists('mangoes', $keys))
vs
if (isset($keys['mangoes'])) { ... }
7)regexps
POSIX-regexps
vs
Perl-regexps
8)constants
UPPER case constans (TRUE, FALSE)
vs
lower case constans (true, false)
9)for
for ($i = 0; $i < FUNCTION($j); $i++) {...}
vs
for ($i = 0, $k = FUNCTION($j); $i < $k; $i = $i + 1) {...}
10)strings
"var=$var"
vs
'var='.$var
*/
/*
** Description:
** Optimization class. Provide functions for
** PHP code optimization.
**
** Author:
** Eugene Grigorjev (eugene.grigorjev@zabbix.com)
**/
define("USE_PROFILING",1);
if(defined('USE_PROFILING'))
{
$starttime[]=array();
class COpt
{
/* protected static $starttime[]=array(); */
/* protected static */ function getmicrotime()
{
list($usec, $sec) = explode(" ",microtime());
return ((float)$usec + (float)$sec);
}
/* public static */ function profiling_start($type=NULL)
{
global $starttime;
if(is_null($type)) $type="global";
$starttime[$type] = COpt::getmicrotime();
}
/* public static */ function profiling_stop($type=NULL)
{
global $starttime;
$endtime = COpt::getmicrotime();
if(is_null($type)) $type="global";
// echo "<br/>\nTime to execute (".$type."): ". bcsub($endtime,$starttime[$type],6)." seconds!\n<br/>";
echo "<br/>\nTime to execute (".$type."): ".($endtime-$starttime[$type])." seconds!\n<br/>";
}
}
COpt::profiling_start("page");
}
else
{
class COpt
{
/* public static */ function profiling_start($type=NULL) {}
/* public static */ function profiling_stop($type=NULL) {}
}
}
?>
|
