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

Run details:

User agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36

Browser: Chrome 66

Operating system: Windows 8.1

Device Platform: Other

Date tested: 6 years ago

Test name	Executions per second
slice	8241.7 Ops/sec
spread operator	7206.9 Ops/sec
push apply into empty array	39575.7 Ops/sec
Array.from	6020.3 Ops/sec
Object.values	1540.0 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)