Run results for: Vanilla JS, Cash and jQuery - GetID Speed Test

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; ONEPLUS A3000) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Mobile Safari/537.36

Browser: Chrome Mobile 87

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
getElementById	1156973.0 Ops/sec
jQuery (tag.id)	76735.5 Ops/sec
jQuery (tag#id)	70745.9 Ops/sec
jQuery (.id)	109822.7 Ops/sec
jQuery (#id)	166317.1 Ops/sec
Cash + getElementsByClassName	199950.3 Ops/sec
Cash + getElementById	308443.1 Ops/sec
Cash (tag.id)	135983.7 Ops/sec
jQuery + getElementById	324410.0 Ops/sec
Cash (tag#id)	121324.0 Ops/sec
Cash (#id)	198019.5 Ops/sec
querySelectorAll (.id)	309449.4 Ops/sec
querySelectorAll (#id)	179858.2 Ops/sec
querySelector (.id)	787042.4 Ops/sec
querySelector (#id)	604543.9 Ops/sec
getElementsByTagName	842665.1 Ops/sec
getElementsByClassName	493337.8 Ops/sec
Cash (.id)	168384.1 Ops/sec
jQuery + getElementsByClassName	99243.3 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"><script>
<script>jQuery.noConflict();</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/cash/7.0.3/cash.min.js"></script>
<div id="foo" class="foo2"></div>

Tests:

getElementById
var el = document.getElementById("foo"); var className = el.className;
getElementsByClassName
var el = document.getElementsByClassName("foo2"); var className = el.className;
getElementsByTagName
var el = document.getElementsByTagName("div")[0]; var className = el.className;
querySelector (#id)
var el = document.querySelector('#foo'); var className = el.className;
querySelector (.id)
var el = document.querySelector('.foo2'); var className = el.className;
querySelectorAll (#id)
var el = document.querySelectorAll('#foo'); var className = el.className;
querySelectorAll (.id)
var el = document.querySelectorAll('.foo2'); var className = el.className;
Cash (#id)
var el = $("#foo"); var className = el.className;
Cash (.id)
var el = $(".foo2"); var className = el.className;
Cash (tag#id)
var el = $("div#foo"); var className = el.className;
Cash (tag.id)
var el = $("div.foo2"); var className = el.className;
Cash + getElementById
var el = $(document.getElementById("foo")); var className = el.className;
Cash + getElementsByClassName
var el = $(document.getElementsByClassName("foo2")); var className = el.className;
jQuery (#id)
var el = jQuery("#foo"); var className = el.className;
jQuery (.id)
var el = jQuery(".foo2"); var className = el.className;
jQuery (tag#id)
var el = jQuery("div#foo"); var className = el.className;
jQuery (tag.id)
var el = jQuery("div.foo2"); var className = el.className;
jQuery + getElementById
var el = jQuery(document.getElementById("foo")); var className = el.className;
jQuery + getElementsByClassName
var el = jQuery(document.getElementsByClassName("foo2")); var className = el.className;

Run results for: Vanilla JS, Cash and jQuery - GetID Speed Test

getElementById

getElementsByClassName

getElementsByTagName

querySelector (#id)

querySelector (.id)

querySelectorAll (#id)

querySelectorAll (.id)

Cash (#id)

Cash (.id)

Cash (tag#id)

Cash (tag.id)

Cash + getElementById

Cash + getElementsByClassName

jQuery (#id)

jQuery (.id)

jQuery (tag#id)

jQuery (tag.id)

jQuery + getElementById

jQuery + getElementsByClassName