Run results for: insertAdjacentHTML vs append cloneNode

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
append cloneNode	3.9 Ops/sec
insertAdjacentHTML	1.2 Ops/sec

HTML Preparation code:

<form id='test'></form>

Tests:

append cloneNode
const htmlStrg = `<fieldset class='grid-container'><div class='cell'><input type='date' name='date' class='input input-date'></div></fieldset>` const parsedHTML = new DOMParser().parseFromString(htmlStrg, 'text/html').body.firstChild const form = document.getElementById('test') for (let i = 0; i < 200; i++) { form.appendChild(parsedHTML.cloneNode(true)) }
insertAdjacentHTML
const htmlStrg = `<fieldset class='grid-container'><div class='cell'><input type='date' name='date' class='input input-date'></div></fieldset>` const form = document.getElementById('test') for (let i = 0; i < 200; i++) { form.insertAdjacentHTML('beforeend', htmlStrg) }