Run results for: Array.prototype.slice vs Array.from vs Spread with Node List

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 11.0.0

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Array.prototype.slice on NodeList	6853316.5 Ops/sec
Array.prototype.concat on NodeList	6751297.5 Ops/sec
Array.from on NodeList	80899.6 Ops/sec
Spread on NodeList	79751.1 Ops/sec

HTML Preparation code:

<ul>
</ul>

Script Preparation code:

var fooSet = new Set();
var ul = document.querySelector('ul');
for(var i=0;i<100;i++) {
  fooSet.add(i);
  ul.appendChild(document.createElement('li'));
}

var listItems = document.querySelectorAll('li');

Tests:

Array.prototype.slice on NodeList
var other = [].slice.call(fooSet);
Array.prototype.concat on NodeList
var other = [].concat.call([],fooSet);
Array.from on NodeList
var other = Array.from(listItems);
Spread on NodeList
var other = [...listItems];

Run results for: Array.prototype.slice vs Array.from vs Spread with Node List

Array.prototype.slice on NodeList

Array.prototype.concat on NodeList

Array.from on NodeList

Spread on NodeList