Run results for: angular.isUndefined vs lodash isUndefined vs typeof === undefined fixed

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; GM1910) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.111 Mobile Safari/537.36

Browser: Chrome Mobile 84

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
angular.isUndefined	2358331.0 Ops/sec
lodash.isUndefined	2359700.0 Ops/sec
Native js	2460807.0 Ops/sec
simplify native js	4676611.0 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.2/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.6.1/lodash.min.js"></script>

Script Preparation code:

var foo;

Tests:

angular.isUndefined
if (angular.isUndefined(foo)) { foo; }
lodash.isUndefined
if (_.isUndefined(foo)) { foo; }
Native js
if (foo === undefined) { foo; }
simplify native js
if (!foo) { foo; }

Run results for: angular.isUndefined vs lodash isUndefined vs typeof === undefined fixed

angular.isUndefined

lodash.isUndefined

Native js

simplify native js