Run results for: Covert Node List to array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array.from on NodeList	5517.7 Ops/sec
Spread on NodeList	5754.1 Ops/sec
[].slice.call	8421.5 Ops/sec
for each push	8360.5 Ops/sec
for each cached new Array with know listItems length	8637.2 Ops/sec
for loop cached length	5637.9 Ops/sec

HTML Preparation code:

<ul>
</ul>

Script Preparation code:

var fooSet = new Set();
var ul = document.querySelector('ul');
for(var i=0;i<1000;i++) {
  fooSet.add(i);
  ul.appendChild(document.createElement('li'));
}

var listItems = document.querySelectorAll('li');

Tests:

Array.from on NodeList
var other = Array.from(listItems);
Spread on NodeList
var other = [...listItems];
[].slice.call
var other = [].slice.call(listItems);
for each push
var other = [] listItems.forEach(item => other.push(item))
for each cached new Array with know listItems length
var other = new Array(listItems.length) listItems.forEach((item,i) => other[i] = item)
for loop cached length
var other = new Array(listItems.length) for (let i = 0; i < listItems.length; i++) { other[i] = listItems[i]; }

Run results for: Covert Node List to array

Array.from on NodeList

Spread on NodeList

[].slice.call

for each push

for each cached new Array with know listItems length

for loop cached length