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<?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);
$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)
{
if(!defined('USE_PROFILING')) return;
global $starttime;
if(is_null($type)) $type="global";
$starttime[$type] = COpt::getmicrotime();
}
/* public static */ function profiling_stop($type=NULL)
{
if(!defined('USE_PROFILING')) return;
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/>";
}
}
?>
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