Run results for: querySelectorAll custom attribute vs class name

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/113.0

Browser: Firefox 113

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
custom attribute	352572.1 Ops/sec
class name	659685.8 Ops/sec

HTML Preparation code:

<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>
<div class="test" js="test"></div>

Tests:

custom attribute
const test = document.querySelectorAll('[js="test"]');
class name
const test = document.querySelectorAll('.test');