Run results for: querySelector vs getElementsByClassName

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0

Browser: Firefox 47

Operating system: Windows 7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
querySelector	2572097.0 Ops/sec
getElementsByClassName	22407480.0 Ops/sec

HTML Preparation code:

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

Tests: