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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36

Browser: Chrome 89

Operating system: Mac OS X 11.2.1

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
slice	1033616.0 Ops/sec
spread operator	976093.4 Ops/sec
push apply into empty array	2897701.0 Ops/sec
Array.from	833059.7 Ops/sec
Object.values	175881.0 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)