Run results for: querySelector vs getElementsByClassName with destructuring assignment

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

querySelector

28.9M/s

getElementsByClassName with destructuring assignment

15.9M/s

View exact numbers

Test name	Executions per second
✓ querySelector	28,864,912 Ops/sec
getElementsByClassName with destructuring assignment	15,923,286 Ops/sec

HTML Preparation code:

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

Tests:

querySelector
/*When writing async/deferred tests, use `deferred.resolve()` to mark test as done*/ const testElement = document.querySelector(".test");
getElementsByClassName with destructuring assignment
const [testElement] = document.getElementsByClassName(".test");