perf($compile): use createMap() for directive bindings to allow fast forEach

jbedard · gkalpak · commit 832b383cbc63 · 2016-04-13T12:06:55.000+03:00
Closes angular#12529
diff --git a/src/ng/compile.js b/src/ng/compile.js
@@ -782,7 +782,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
   function parseIsolateBindings(scope, directiveName, isController) {
     var LOCAL_REGEXP = /^\s*([@&]|=(\*?))(\??)\s*(\w*)\s*$/;
 
-    var bindings = {};
+    var bindings = createMap();
 
     forEach(scope, function(definition, scopeName) {
       if (definition in bindingCache) {
