Landing pull request 503. 1.7 data: set a flag in the private data cache to avoid having to scan attributes multiple times - Fixes #8909.

More Details:
 - https://github.com/jquery/jquery/pull/503
 - http://bugs.jquery.com/ticket/8909

1 files changed, 6 insertions, 4 deletions

diff --git a/src/data.js b/src/data.js
index 9de0da1c5..1c6d1852c 100644
--- a/src/data.js
+++ b/src/data.js
@@ -231,14 +231,15 @@ jQuery.extend({
 
 jQuery.fn.extend({
 	data: function( key, value ) {
-		var data = null;
+		var parts, attr, name,
+			data = null;
 
 		if ( typeof key === "undefined" ) {
 			if ( this.length ) {
 				data = jQuery.data( this[0] );
 
-				if ( this[0].nodeType === 1 ) {
-			    var attr = this[0].attributes, name;
+				if ( this[0].nodeType === 1 && !jQuery._data( this[0], "parsedAttrs" ) ) {
+					attr = this[0].attributes;
 					for ( var i = 0, l = attr.length; i < l; i++ ) {
 						name = attr[i].name;
 
@@ -248,6 +249,7 @@ jQuery.fn.extend({
 							dataAttr( this[0], name, data[ name ] );
 						}
 					}
+					jQuery._data( this[0], "parsedAttrs", true );
 				}
 			}
 
@@ -259,7 +261,7 @@ jQuery.fn.extend({
 			});
 		}
 
-		var parts = key.split(".");
+		parts = key.split(".");
 		parts[1] = parts[1] ? "." + parts[1] : "";
 
 		if ( value === undefined ) {