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

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; Pixel 4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.117 Mobile Safari/537.36

Browser: Chrome Mobile 81

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
getElementById	2297748.0 Ops/sec
jQuery (tag.id)	265222.0 Ops/sec
jQuery (tag#id)	245514.6 Ops/sec
jQuery (.id)	477133.6 Ops/sec
jQuery (#id)	639774.1 Ops/sec
Cash + getElementsByClassName	297341.9 Ops/sec
Cash + getElementById	813374.5 Ops/sec
Cash (tag.id)	439874.0 Ops/sec
jQuery + getElementById	901583.6 Ops/sec
Cash (tag#id)	378025.3 Ops/sec
Cash (#id)	735307.8 Ops/sec
querySelectorAll (.id)	716663.1 Ops/sec
querySelectorAll (#id)	551654.8 Ops/sec
querySelector (.id)	1373180.0 Ops/sec
querySelector (#id)	1126230.0 Ops/sec
getElementsByTagName	1561268.0 Ops/sec
getElementsByClassName	1242656.0 Ops/sec
Cash (.id)	614780.6 Ops/sec
jQuery + getElementsByClassName	307128.5 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