Run results for: JS: append vs appendChild - list of elements (1000 items)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:120.0) Gecko/20100101 Firefox/120.0

Browser: Firefox 120

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

append

5K/s

appendChild

3K/s

View exact numbers

Test name	Executions per second
✓ append	4,763 Ops/sec
appendChild	2,516 Ops/sec

HTML Preparation code:

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

Script Preparation code:

var container = document.getElementById("container");
var paragraph = document.createElement("p");
var num = 1000;

Tests:

append
const elArray = new Array(1000).fill(paragraph); container.append(...elArray);
appendChild
for(let i = 0; i < 1000; i++) { container.appendChild(paragraph); }