Put the split to get the list of promise methods out of the promise method itself...

diff --git a/src/core.js b/src/core.js
index 25ef22d..fbf6491 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -63,6 +63,9 @@ var jQuery = function( selector, context ) {
        // The deferred used on DOM ready
        readyList,
 
+       // Promise methods
+       promiseMethods = "then done fail isResolved isRejected promise".split( " " ),
+
        // The ready event handler
        DOMContentLoaded,
 
@@ -914,16 +917,18 @@ jQuery.extend({
                        isRejected: failDeferred.isResolved,
                        // Get a promise for this deferred
                        // If obj is provided, the promise aspect is added to the object
-                       promise: function( obj ) {
+                       // (i is used internally)
+                       promise: function( obj , i ) {
                                if ( obj == null ) {
                                        if ( promise ) {
                                                return promise;
                                        }
                                        promise = obj = {};
                                }
-                               jQuery.each( "then done fail isResolved isRejected promise".split( " " ) , function( _ , method ) {
-                                       obj[ method ] = deferred[ method ];
-                               });
+                               i = promiseMethods.length;
+                               while( i-- ) {
+                                       obj[ promiseMethods[ i ] ] = deferred[ promiseMethods[ i ] ];
+                               }
                                return obj;
                        }