Widget: Improve performance of cleanData method

Fixes #9546
Closes gh-1291

Author: felvhage

ui/widget.js

@@ -25,9 +25,16 @@ var widget_uuid = 0,
 
 $.cleanData = (function( orig ) {
 	return function( elems ) {
-		for ( var i = 0, elem; (elem = elems[i]) != null; i++ ) {
+		var events, elem, i;
+		for ( i = 0; (elem = elems[i]) != null; i++ ) {
 			try {
-				$( elem ).triggerHandler( "remove" );
+
+				// Only trigger remove when necessary to save time
+				events = $._data( elem, "events" );
+				if ( events && events.remove ) {
+					$( elem ).triggerHandler( "remove" );
+				}
+
 			// http://bugs.jquery.com/ticket/8235
 			} catch( e ) {}
 		}