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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 12

Operating system: iOS 12.3.1

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
slice	1605454.0 Ops/sec
spread operator	1613673.0 Ops/sec
push apply into empty array	1824144.0 Ops/sec
Array.from	1055646.0 Ops/sec
Object.values	1091485.0 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