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/ngScenario/dslSpec.js b/test/ngScenario/dslSpec.js
index f94ec583..2553fadd 100644
--- a/test/ngScenario/dslSpec.js
+++ b/test/ngScenario/dslSpec.js
@@ -53,7 +53,7 @@ describe("angular.scenario.dsl", function() {
     // Just use the real one since it delegates to this.addFuture
     $root.addFutureAction = angular.scenario.
       SpecRunner.prototype.addFutureAction;
-    jqLite($window.document).html('');
+    jqLite($window.document).empty();
   }));
 
   afterEach(function(){