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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);
// define("USE_TIME_PROF",1);
// define("USE_MEM_PROF",1);
// define("USE_SQLREQUEST_PROF",1);
// define("SHOW_SQLREQUEST_DETAILS",1);
if(defined('USE_PROFILING'))
{
$starttime=array();
$memorystamp=array();
$sqlrequests=array();
$sqlmark = array();
class COpt
{
/* protected static $starttime[]=array(); */
/* protected static */ function getmicrotime() {
if(defined('USE_TIME_PROF')) {
list($usec, $sec) = explode(' ',microtime()); return ((float)$usec + (float)$sec);
}else {
return 0;
}
}
/* protected static */ function getmemoryusage() {
if(defined('USE_MEM_PROF')) {
return memory_get_usage('memory_limit');
} else {
return 0;
}
}
/* protected static */ function mem2str($size)
{
$prefix = 'B';
if($size > 1048576) { $size = $size/1048576; $prefix = 'M'; }
elseif($size > 1024) { $size = $size/1024; $prefix = 'K'; }
return round($size, 6).$prefix;
}
/* public static */ function profiling_start($type=NULL)
{
global $starttime;
global $memorystamp;
global $sqlmark;
global $sqlrequests;
if(is_null($type)) $type='global';
$starttime[$type] = COpt::getmicrotime();
$memorystamp[$type] = COpt::getmemoryusage();
if(defined('USE_SQLREQUEST_PROF'))
{
$sqlmark[$type] = count($sqlrequests);
}
}
/* public static */ function savesqlrequest($sql)
{
if(defined('USE_SQLREQUEST_PROF'))
{
global $sqlrequests;
array_push($sqlrequests, $sql);
}
}
/* public static */ function profiling_stop($type=NULL)
{
global $starttime;
global $memorystamp;
global $sqlrequests;
global $sqlmark;
$endtime = COpt::getmicrotime();
$memory = COpt::getmemoryusage();
if(is_null($type)) $type='global';
echo "<br>\n";
if(defined('USE_TIME_PROF'))
{
echo "(".$type.") Time to execute: ".round($endtime - $starttime[$type],6)." seconds!\n<br>\n";
}
if(defined('USE_MEM_PROF'))
{
echo "(".$type.") Memory limit : ".ini_get('memory_limit')."<br>\n";
echo "(".$type.") Memory usage : ".COpt::mem2str($memorystamp[$type])." - ".COpt::mem2str($memory)."\n<br>\n";
echo "(".$type.") Memory leak : ".COpt::mem2str($memory - $memorystamp[$type])."\n<br>\n";
}
if(defined('USE_SQLREQUEST_PROF'))
{
$requests_cnt = count($sqlrequests);
echo "(".$type.") SQL requests count: ".($requests_cnt - $sqlmark[$type])."<br>\n";
if(defined('SHOW_SQLREQUEST_DETAILS'))
{
for($i = $sqlmark[$type]; $i < $requests_cnt; $i++)
{
echo "(".$type.") SQL request : ".$sqlrequests[$i]."<br>\n";;
}
}
}
}
/* public static */ function set_memory_limit($limit='8M')
{
ini_set('memory_limit',$limit);
}
}
COpt::set_memory_limit('8M');
COpt::profiling_start("script");
}
else
{
class COpt
{
/* public static */ function profiling_start($type=NULL) {}
/* public static */ function profiling_stop($type=NULL) {}
/* public static */ function savesqlrequest($sql) {}
}
}
?>
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