Run results for: IDL-Attributes vs URI.js vs native URL vs webcomponents/url

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36

Browser: Chrome 91

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
IDL-Attributes	438435.4 Ops/sec
URI.js	177689.4 Ops/sec
new URL()	722312.0 Ops/sec
webcomponents/URL	716967.3 Ops/sec

HTML Preparation code:

<script>forceJURL = true;</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/URI.js/1.19.1/URI.js"></script>
<script src="https://raw.githubusercontent.com/webcomponents/URL/v0.7.3/url.js"></script>

Tests:

IDL-Attributes
var a = document.createElement('a'); a.href = 'http://www.example.org/path/to/file.html?some=param#hash'; a.pathname = '/path/to/other/file.html'; a.href + '';
URI.js
var a = new URI('http://www.example.org/path/to/file.html?some=param#hash'); a.pathname('/path/to/other/file.html'); a.href();
new URL()
var u = new URL('http://www.example.org/path/to/file.html?some=param#hash'); u.pathname = '/path/to/other/file.html'; u.toString();
webcomponents/URL
var u = new URL('http://www.example.org/path/to/file.html?some=param#hash'); u.pathname = '/path/to/other/file.html'; u.toString();

Run results for: IDL-Attributes vs URI.js vs native URL vs webcomponents/url

IDL-Attributes

URI.js

new URL()

webcomponents/URL