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

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/component-spec/annotationsSpec.js b/docs/component-spec/annotationsSpec.js
index a2a78077..60b17d9a 100644
--- a/docs/component-spec/annotationsSpec.js
+++ b/docs/component-spec/annotationsSpec.js
@@ -5,7 +5,7 @@ describe('Docs Annotations', function() {
   var body;
   beforeEach(function() {
     body = angular.element(document.body);
-    body.html('');
+    body.empty();
   });
 
   var normalizeHtml = function(html) {