Benchmark: Select by tag name vs select by id - MeasureThat.net

HTML Preparation code:

<script type="text/javascript" src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
<div id="testThisId"></div>

Tests:

jQuery (get by id)
var el = $("#testElement")[0];
jQuery (get by tag name)
var el = $("div")[0];
Vanilla JS (get by id)
var el = document.getElementById('testThisId');
Vanilla JS (get by tag name)
var el = document.getElementsByTagName('div');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jQuery (get by id)
jQuery (get by tag name)
Vanilla JS (get by id)
Vanilla JS (get by tag name)

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36

Browser/OS: Chrome 80 on Windows

View result in a separate tab

Test name	Executions per second
jQuery (get by id)	1538850.0 Ops/sec
jQuery (get by tag name)	519281.4 Ops/sec
Vanilla JS (get by id)	3367496.0 Ops/sec
Vanilla JS (get by tag name)	2114631.0 Ops/sec