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

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; TECNO BD2d) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.104 Mobile Safari/537.36 OPR/67.1.3508.63168

Browser: Opera Mobile 67

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
class	178402.7 Ops/sec
ID	137685.7 Ops/sec
data-attribute	109279.0 Ops/sec
data-attribute partial	54504.6 Ops/sec
data-attribute exact	57250.9 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