Index: includes/Parser.php
===================================================================
--- includes/Parser.php	(revision 33266)
+++ includes/Parser.php	(working copy)
@@ -3285,6 +3285,21 @@
 	}
 
 	/**
+	 * Increment the expensive function count
+	 *
+	 * @return boolean False if the limit has been exceeded
+	 */
+
+	function incrementExpensiveFunctionCount() {
+		global $wgExpensiveParserFunctionLimit;
+		$this->mExpensiveFunctionCount++;
+		if ( $this->mExpensiveFunctionCount <= $wgExpensiveParserFunctionLimit ) {
+			return true;
+		}
+		return false;
+	}
+
+	/**
 	 * Strip double-underscore items like __NOGALLERY__ and __NOTOC__
 	 * Fills $this->mDoubleUnderscores, returns the modified text
 	 */
Index: includes/CoreParserFunctions.php
===================================================================
--- includes/CoreParserFunctions.php	(revision 33266)
+++ includes/CoreParserFunctions.php	(working copy)
@@ -42,6 +42,7 @@
 		$parser->setFunctionHook( 'defaultsort',      array( __CLASS__, 'defaultsort'      ), SFH_NO_HASH );
 		$parser->setFunctionHook( 'filepath',         array( __CLASS__, 'filepath'         ), SFH_NO_HASH );
 		$parser->setFunctionHook( 'pagesincategory',  array( __CLASS__, 'pagesincategory'  ), SFH_NO_HASH );
+		$parser->setFunctionHook( 'pagesize',         array( __CLASS__, 'pagesize'         ), SFH_NO_HASH );
 		$parser->setFunctionHook( 'tag',              array( __CLASS__, 'tagObj'           ), SFH_OBJECT_ARGS );
 
 		if ( $wgAllowDisplayTitle ) {
@@ -217,22 +218,37 @@
 	}
 	
 	static function pagesincategory( $parser, $category = '', $raw = null ) {
-		global $wgExpensiveParserFunctionLimit;
-		if ($category == '') {
+		if ( ! $parser->incrementExpensiveFunctionCount() )
 			return 0;
+	
+		if ($category == '') 
+			return 0;
+	
+		$category = Category::newFromName($category);
+		$count = $category->getPageCount();
+		if ( !$count ) {
+			$count = 0;
 		}
-		$parser->mExpensiveFunctionCount++;
-		if ($parser->mExpensiveFunctionCount <= $wgExpensiveParserFunctionLimit) {
-			$category = Category::newFromName($category);
-			$count = $category->getPageCount();
-			if ( !$count ) {
-				$count = 0;
-			}
-			return self::formatRaw( $count, $raw );
-		}
-		return 0;
+		return self::formatRaw( $count, $raw );
 	}
 
+	static function pagesize( $parser, $page = '', $raw = null ) {
+		if ( ! $parser->incrementExpensiveFunctionCount() )
+			return 0;
+
+		$length = 0;
+		$title = Title::newFromText($page);
+		if ( $title ) {
+			$length = $title->getLength();
+	
+			// Register dependency in templatelinks
+			$id = $title->getArticleId();
+			$revid = Revision::newFromTitle($title);
+			$parser->mOutput->addTemplate($title, $id, $revid);
+		}	
+		return self::formatRaw( $length, $raw );
+	}
+
 	static function language( $parser, $arg = '' ) {
 		global $wgContLang;
 		$lang = $wgContLang->getLanguageName( strtolower( $arg ) );
@@ -336,5 +352,15 @@
 		);
 		return $parser->extensionSubstitution( $params, $frame );
 	}
+
+	static function incrementExpensiveFunctionCount($parser) {
+		global $wgExpensiveParserFunctionLimit;
+		$parser->mExpensiveFunctionCount++;
+		if ($parser->mExpensiveFunctionCount <= $wgExpensiveParserFunctionLimit) {
+			return true;
+		}
+		return false;
+	}
+	
 }
 
Index: languages/messages/MessagesEn.php
===================================================================
--- languages/messages/MessagesEn.php	(revision 33266)
+++ languages/messages/MessagesEn.php	(working copy)
@@ -339,6 +339,7 @@
 	'tag'                    => array( 0,    'tag'                    ),
 	'hiddencat'              => array( 1,    '__HIDDENCAT__'          ),
 	'pagesincategory'        => array( 1,    'PAGESINCATEGORY', 'PAGESINCAT' ),
+	'pagesize'               => array( 1,    'PAGESIZE'               ),
 );
 
 /**