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

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0

Browser: Firefox 133

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

getElementById

7.4M/s

getElementsByTagName

3.8M/s

querySelector by attribute (partial matching) - variant (starts with)

2.7M/s

querySelector by attribute (partial matching)

2.6M/s

View exact numbers

Test name	Executions per second
✓ getElementById	7,350,654 Ops/sec
getElementsByTagName	3,806,827 Ops/sec
querySelector by attribute (partial matching) - variant (starts with)	2,687,982 Ops/sec
querySelector by attribute (partial matching)	2,552,812 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];