Run results for: new attr vs update attr

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.79 Safari/537.36

Browser: Chrome 100

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
add new attr	1298485.8 Ops/sec
update attr	1381163.5 Ops/sec

HTML Preparation code:

<div id="foo" aria-label=""></div>

Tests:

add new attr
const element = document.getElementById("foo"); element.setAttribute('tabindex', '0');
update attr
const element = document.getElementById("foo"); element.setAttribute('aria-label', 'test');