perf($compile): delay object initialization in nodeLinkFn

Author: IgorMinar

src/ng/compile.js

@@ -1470,7 +1470,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
 
 
       function nodeLinkFn(childLinkFn, scope, linkNode, $rootElement, boundTranscludeFn) {
-        var i, ii, linkFn, controller, isolateScope, elementControllers = {}, transcludeFn;
+        var i, ii, linkFn, controller, isolateScope, elementControllers, transcludeFn;
 
         var $element = jqLite(linkNode);
         var attrs = (compileNode === linkNode)
@@ -1568,6 +1568,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
         }
         transcludeFn = boundTranscludeFn && controllersBoundTransclude;
         if (controllerDirectives) {
+          elementControllers = {};
           forEach(controllerDirectives, function(directive) {
             var locals = {
               $scope: directive === newIsolateScopeDirective || directive.$$isolateScope ? isolateScope : scope,