perf($compile): only create jqLite object when necessary

Author: jbedard

src/ng/compile.js

@@ -931,7 +931,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
             : null;
 
         if (nodeLinkFn && nodeLinkFn.scope) {
-          safeAddClass(jqLite(nodeList[i]), 'ng-scope');
+          safeAddClass(attrs.$$element, 'ng-scope');
         }
 
         childLinkFn = (nodeLinkFn && nodeLinkFn.terminal ||
@@ -953,7 +953,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
       return linkFnFound ? compositeLinkFn : null;
 
       function compositeLinkFn(scope, nodeList, $rootElement, parentBoundTranscludeFn) {
-        var nodeLinkFn, childLinkFn, node, $node, childScope, i, ii, n, childBoundTranscludeFn;
+        var nodeLinkFn, childLinkFn, node, childScope, i, ii, n, childBoundTranscludeFn;
 
         // copy nodeList so that linking doesn't break due to live list updates.
         var nodeListLength = nodeList.length,
@@ -966,12 +966,11 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
           node = stableNodeList[n];
           nodeLinkFn = linkFns[i++];
           childLinkFn = linkFns[i++];
-          $node = jqLite(node);
 
           if (nodeLinkFn) {
             if (nodeLinkFn.scope) {
               childScope = scope.$new();
-              $node.data('$scope', childScope);
+              jqLite(node).data('$scope', childScope);
             } else {
               childScope = scope;
             }
@@ -1273,12 +1272,12 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
           if (directiveValue == 'element') {
             hasElementTranscludeDirective = true;
             terminalPriority = directive.priority;
-            $template = groupScan(compileNode, attrStart, attrEnd);
+            $template = $compileNode;
             $compileNode = templateAttrs.$$element =
                 jqLite(document.createComment(' ' + directiveName + ': ' +
                                               templateAttrs[directiveName] + ' '));
             compileNode = $compileNode[0];
-            replaceWith(jqCollection, jqLite(sliceArgs($template)), compileNode);
+            replaceWith(jqCollection, sliceArgs($template), compileNode);
 
             childTranscludeFn = compile($template, transcludeFn, terminalPriority,
                                         replaceDirective && replaceDirective.name, {
@@ -1462,20 +1461,19 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
 
         if (newIsolateScopeDirective) {
           var LOCAL_REGEXP = /^\s*([@=&])(\??)\s*(\w*)\s*$/;
-          var $linkNode = jqLite(linkNode);
 
           isolateScope = scope.$new(true);
 
           if (templateDirective && (templateDirective === newIsolateScopeDirective ||
               templateDirective === newIsolateScopeDirective.$$originalDirective)) {
-            $linkNode.data('$isolateScope', isolateScope) ;
+            $element.data('$isolateScope', isolateScope);
           } else {
-            $linkNode.data('$isolateScopeNoTemplate', isolateScope);
+            $element.data('$isolateScopeNoTemplate', isolateScope);
           }
 
 
 
-          safeAddClass($linkNode, 'ng-isolate-scope');
+          safeAddClass($element, 'ng-isolate-scope');
 
           forEach(newIsolateScopeDirective.scope, function(definition, scopeName) {
             var match = definition.match(LOCAL_REGEXP) || [],