Run results for: Array.prototype.concat vs spread operator on NodeList

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 YaBrowser/18.11.1.805 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 18

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
slice	341011.7 Ops/sec
spread operator	455460.1 Ops/sec
push apply into empty array	1193592.6 Ops/sec
Array.from	285298.1 Ops/sec
Object.values	84355.2 Ops/sec

Script Preparation code:

var dom = document.body.querySelectorAll('*')

Tests:

slice
var other = Array.prototype.slice.call(dom);
spread operator
var other = [ ...dom ]
push apply into empty array
var other = []; [].push.apply(other, dom)
Array.from
var other = Array.from(dom);
Object.values
var other = Object.values(dom)

Run results for: Array.prototype.concat vs spread operator on NodeList

Compare the new ES6 spread operator with the traditional concat() method

slice

spread operator

push apply into empty array

Array.from

Object.values