Run results for: Array.prototype.concat vs spread operator on NodeList v2 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.2 Safari/605.1.15

Browser: Safari 12

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
slice	1620778.0 Ops/sec
spread operator	1915647.0 Ops/sec
push apply into empty array	2253432.0 Ops/sec
Array.from	1404955.0 Ops/sec
Object.values	1183592.0 Ops/sec
For of push	2955744.0 Ops/sec
Array.contact	4791289.0 Ops/sec

Website performance monitoring

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)
For of push
var other = []; for (let el of dom) { other.push(el); }
Array.contact
var other = [].concat(dom);