Run results for: querySelector vs getElementsByClassName[0] Perf

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36

Browser: Chrome 70

Operating system: Windows 7

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
QuerySelector	1465858.6 Ops/sec
GetElementsByClassName[0]	1418027.6 Ops/sec

HTML Preparation code:

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

AخA
 
<div class="test"></div>

Tests:

QuerySelector
document.querySelector(".test");
document.querySelector(".test");
GetElementsByClassName[0]
document.getElementsByClassName("test")[0];
document.getElementsByClassName("test")[0];