Run results for: NodeList vs Array iterator 4

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36

Browser: Chrome 96

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
nodeList	9445.2 Ops/sec
array	15460.3 Ops/sec
created array	11840.6 Ops/sec
spread array	11909.8 Ops/sec

HTML Preparation code:

<ul>
</ul>

Script Preparation code:

var ul = document.querySelector('ul');
for(var i=0;i<100;i++) {
  ul.appendChild(document.createElement('li'));
}

var nodeList = document.querySelectorAll('li');
var array = Array.from(nodeList);

Tests:

nodeList
for (const i of nodeList) { i.classList.add("hi"); } for (const i of nodeList) { i.classList.add("hi"); }
array
for (const i of array) { i.classList.add("hi"); } for (const i of array) { i.classList.add("hi"); }
created array
let a2 = Array.from(nodeList); for (const i of a2) { i.classList.add("hi"); } for (const i of a2) { i.classList.add("hi"); }
spread array
let a3 = [...nodeList]; for (const i of a3) { i.classList.add("hi"); } for (const i of a3) { i.classList.add("hi"); }

Run results for: NodeList vs Array iterator 4

nodeList

array

created array

spread array