Run results for: querySelectorAll vs JQuery

Compares the performance of querySelectorAll against JQuery for selecting elements. For class selector, getElementsByClassName is the best. For element selector, getElementsByTagName is the best.

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Teams/1.4.00.35564 Chrome/85.0.4183.121 Electron/10.4.7 Safari/537.36

Browser: Chrome 85

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

jQuery selector by Class

16K/s

querySelectorAll by Class

10K/s

querySelectorAll by Attribute

9K/s

jQuery selector by Element

8K/s

querySelectorAll by Element

8K/s

jQuery selector by Attribute

6K/s

View exact numbers

Test name	Executions per second
✓ jQuery selector by Class	16,135 Ops/sec
querySelectorAll by Class	9,751 Ops/sec
querySelectorAll by Attribute	9,072 Ops/sec
jQuery selector by Element	8,463 Ops/sec
querySelectorAll by Element	8,090 Ops/sec
jQuery selector by Attribute	6,449 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>
<content id="demo">Hello World!</content>

Script Preparation code:

let components = '';
for (let i=0; i<10000; i+=1) {
    components += '<div class="component" data-component="component' + i + '">Content ' + i + '</div>'
}
document.getElementById("demo").innerHTML = components;

Tests:

querySelectorAll by Attribute
let components = document.querySelectorAll('[data-component]');
jQuery selector by Attribute
let components = $('[data-component]');
querySelectorAll by Class
let components = document.querySelectorAll('.component');
jQuery selector by Class
let components = $('.component');
querySelectorAll by Element
let components = document.querySelectorAll('div');
jQuery selector by Element
let components = $('div');