Run results for: jQuery by id vs Document.getElementById

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.95 Safari/537.36

Browser: Chrome 55

Operating system: Mac OS X 10.12.3

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
jQuery 3.1.1 Slim	574144.4 Ops/sec
Vanilla JS	2986981.8 Ops/sec

HTML Preparation code:

<script src="//ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.slim.min.js"></script>
<div class="test"></div>
<div class="test2"></div>

AخA
 
<script src="//ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.slim.min.js"></script>
<div class="test"></div>
<div class="test2"></div>

Tests:

jQuery 3.1.1 Slim
var el = $(".test");
var el = $(".test");
Vanilla JS
var el = document.getElementsByClassName('test');
var el = document.getElementsByClassName('test');