Run results for: querySelector by attribute (partial matching) VS getElementById VS getElementsByTagName

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36 Edg/91.0.864.67

Browser: Chrome 91

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
querySelector by attribute (partial matching)	810213.4 Ops/sec
querySelector by attribute (partial matching) - variant (starts with)	920427.6 Ops/sec
getElementById	1630130.0 Ops/sec
getElementsByTagName	1673930.0 Ops/sec

HTML Preparation code:

<video id="vid" src="blob:https://example.com/file.mp4"></video>

Tests:

querySelector by attribute (partial matching)
var test_one = document.querySelector("video[src*='blob:http']");
querySelector by attribute (partial matching) - variant (starts with)
var test_one_variant = document.querySelector("video[src^='blob:http']");
getElementById
var test_two = document.getElementById("vid");
getElementsByTagName
var test_three = document.getElementsByTagName("video")[0];