Run results for: Compare appendChild after createElement, vs appendChild after getElementById (version: 4) (version: 1)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Firefox/91.0

Browser: Firefox 91

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
appendChild to fragment, then append after getElementById (with cloneNode)	15048.2 Ops/sec
appendChild to fragment, then append after createElement (with cloneNode)	18497.8 Ops/sec

HTML Preparation code:

<section id="container"></section>

Tests:

appendChild to fragment, then append after getElementById (with cloneNode)
let fragment = document.createDocumentFragment(); let elem = document.createElement("div"); for (let i = 0; i < 100; i++) { fragment.appendChild(elem); elem = elem.cloneNode(); } let container = document.getElementById("container"); container.appendChild(elem)
appendChild to fragment, then append after createElement (with cloneNode)
let fragment = document.createDocumentFragment(); let elem = document.createElement("div"); for (let i = 0; i < 100; i++) { fragment.appendChild(elem); elem = elem.cloneNode(); } let container = document.createElement("section"); container.appendChild(elem)