perf(jqLite): implement and use the `empty` method in place of `html(‘’)`

jQuery's elem.html('') is way slower than elem.empty(). As clearing
element contents happens quite often in certain scenarios, switching
to using .empty() provides a significant performance boost when using
Angular with jQuery.

Closes #4457

2 files changed, 3 insertions, 3 deletions

diff --git a/src/ng/directive/ngTransclude.js b/src/ng/directive/ngTransclude.js
index 490ea21f..8eefb6ff 100644
--- a/src/ng/directive/ngTransclude.js
+++ b/src/ng/directive/ngTransclude.js
@@ -69,7 +69,7 @@ var ngTranscludeDirective = ngDirective({
 
   link: function($scope, $element, $attrs, controller) {
     controller.$transclude(function(clone) {
-      $element.html('');
+      $element.empty();
       $element.append(clone);
     });
   }
diff --git a/src/ng/directive/select.js b/src/ng/directive/select.js
index 86e04242..d87fa5d3 100644
--- a/src/ng/directive/select.js
+++ b/src/ng/directive/select.js
@@ -333,13 +333,13 @@ var selectDirective = ['$compile', '$parse', function($compile,   $parse) {
           // becomes the compilation root
           nullOption.removeClass('ng-scope');
 
-          // we need to remove it before calling selectElement.html('') because otherwise IE will
+          // we need to remove it before calling selectElement.empty() because otherwise IE will
           // remove the label from the element. wtf?
           nullOption.remove();
         }
 
         // clear contents, we'll add what's needed based on the model
-        selectElement.html('');
+        selectElement.empty();
 
         selectElement.on('change', function() {
           scope.$apply(function() {