Run results for: jQuery by id vs Document.getElementById vs Document.querySelector

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0

Browser: Firefox 61

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
jQuery	0.0 Ops/sec
getElementById	1.7 Ops/sec
querySelector	1.2 Ops/sec

HTML Preparation code:

<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.1.0.min.js"></script>
<div id="cadre_slider_decoration" class="twentytwenty-container">
								<img src="https://www.w3schools.com/css/trolltunga.jpg" id="image_slider_decoration_before" class="image_slider_decoration twentytwenty-before" style="clip: rect(0px 225.5px 301px 0px);">
								<img src="https://www.w3schools.com/css/trolltunga.jpg" id="image_slider_decoration_after" class="image_slider_decoration twentytwenty-after">
							<div class="twentytwenty-overlay"><div class="twentytwenty-before-label"></div><div class="twentytwenty-after-label"></div></div><div class="twentytwenty-handle" style="left: 225.5px;"><span class="twentytwenty-left-arrow"></span><span class="twentytwenty-right-arrow"></span></div></div>

Tests:

jQuery
var sliderW; for(var i = 0; i < 1000000; i++){ sliderW = $("#image_slider_decoration_after"); }
getElementById
var sliderW; for(var i = 0; i < 1000000; i++){ sliderW = document.getElementById("image_slider_decoration_after") }
querySelector
var sliderW; for(var i = 0; i < 1000000; i++){ sliderW = document.querySelector("#image_slider_decoration_after") }

Run results for: jQuery by id vs Document.getElementById vs Document.querySelector

Comparing speed of getting element by id with jQuery vs Vanilla JS

jQuery

getElementById

querySelector