Benchmark: querySelectorAll custom attribute vs class name

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');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
custom attribute
class name

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 10 months ago)

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

Browser/OS: Firefox 113 on Ubuntu

View result in a separate tab

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

querySelectorAll custom attribute vs class name (version: 0)

Comparing performance of: custom attribute vs class name

Created: 10 months ago by: Guest

Jump to the latest result

custom attribute

class name

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A