Run results for: Setattribute vs setAttribute with attribute already set

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

attribute already set

3.5M/s

attribute not set

3.4M/s

View exact numbers

Test name	Executions per second
✓ attribute already set	3,517,906 Ops/sec
attribute not set	3,401,658 Ops/sec

HTML Preparation code:

<div class="withoutAttribute"></div>
<div class="withAttribute" data-bgcolor></div>

Tests:

attribute already set
document.querySelector('.withAttribute').setAttribute('data-bgcolor', 'blue');
attribute not set
document.querySelector('.withoutAttribute').setAttribute('data-bgcolor', 'red');