Run results for: querySelector vs getElementsByTagName[0]

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser: Chrome 110

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
querySelector	8998708.0 Ops/sec
getElementsByTagName	7452778.0 Ops/sec

HTML Preparation code:

<!DOCTYPE html>
<html>

<head>
    <title>A Meaningful Page Title</title>
</head>

<body>

    The content of the document......

</body>

</html>

​x
 
<!DOCTYPE html>
<html>
​
<head>
    <title>A Meaningful Page Title</title>
</head>
​
<body>
​
    The content of the document......
​
</body>
​
</html>

Tests:

querySelector
document.querySelector("head")
document.querySelector("head")
getElementsByTagName
document.getElementsByTagName("head")[0]
document.getElementsByTagName("head")[0]