Run results for: replaceChild vs replaceChildren vs documentFragment 3

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

replaceChild

1.7M/s

append documentFragment

1.4M/s

replaceChildren

994K/s

View exact numbers

Test name	Executions per second
✓ replaceChild	1,738,381 Ops/sec
append documentFragment	1,373,916 Ops/sec
replaceChildren	993,528 Ops/sec

HTML Preparation code:

<div id="container"></div>

Script Preparation code:

var elements = [document.createElement('div'), document.createElement('div')];
var fragment = document.createDocumentFragment();
var container = document.getElementById('container');

elements.forEach(element => fragment.appendChild(element));
container.appendChild(fragment);

Tests:

replaceChild
var changeIndex = 1; elements[changeIndex] = document.createElement('div'); var newChildren = document.createDocumentFragment(); elements.forEach(element => newChildren.appendChild(element)); container.replaceChild(elements[changeIndex], container.children[changeIndex]);
replaceChildren
var changeIndex = 1; elements[changeIndex] = document.createElement('div'); var newChildren = document.createDocumentFragment(); elements.forEach(element => newChildren.appendChild(element)); container.replaceChildren(elements)
append documentFragment
var changeIndex = 1; elements[changeIndex] = document.createElement('div'); var newChildren = document.createDocumentFragment(); elements.forEach(element => newChildren.appendChild(element)); container.replaceChildren(newChildren)