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/test/ngAnimate/animateSpec.js b/test/ngAnimate/animateSpec.js
index 44b623b4..01589da1 100644
--- a/test/ngAnimate/animateSpec.js
+++ b/test/ngAnimate/animateSpec.js
@@ -301,7 +301,7 @@ describe("ngAnimate", function() {
           inject(function($animate, $compile, $rootScope, $timeout, $sniffer) {
 
           $rootScope.$digest();
-          element.html('');
+          element.empty();
 
           var child1 = $compile('<div>1</div>')($rootScope);
           var child2 = $compile('<div>2</div>')($rootScope);