Run results for: querySelector vs getElementsByTagName

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

getElementsByTagName

10.9M/s

querySelector

7.1M/s

View exact numbers

Test name	Executions per second
✓ getElementsByTagName	10,903,561 Ops/sec
querySelector	7,099,618 Ops/sec

HTML Preparation code:

<div></div>

Tests: