- code optimization (Eugene)

git-svn-id: svn://svn.zabbix.com/trunk@2744 97f52cf1-0a1b-0410-bd0e-c28be96e8082

1 files changed, 124 insertions, 0 deletions

diff --git a/frontends/php/include/copt.lib.php b/frontends/php/include/copt.lib.php
new file mode 100644
index 00000000..aaebaab5
--- /dev/null
+++ b/frontends/php/include/copt.lib.php
@@ -0,0 +1,124 @@
+<?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/>";
+		}
+	}
+
+?>