Run results for: DataAttribute vs Class Selector vs ID Selector (extended)

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 YaBrowser/19.6.1.153 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 19

Operating system: Windows 7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
class	1701763.6 Ops/sec
ID	1093183.8 Ops/sec
data-attribute	1048229.6 Ops/sec
data-attribute partial	342991.0 Ops/sec
data-attribute exact	367052.0 Ops/sec

HTML Preparation code:

<div class="hello" id="hello" data-hello data-test="hello-and-bye">Hello</div>

Tests:

class
document.querySelector('.hello');
ID
document.querySelector('#hello');
data-attribute
document.querySelector('[data-hello]');
data-attribute partial
document.querySelectorAll('[data-test~="hello"')
data-attribute exact
document.querySelectorAll('[data-test="hello-and-bye"]')

Run results for: DataAttribute vs Class Selector vs ID Selector (extended)

class

ID

data-attribute

data-attribute partial

data-attribute exact