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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.81 Safari/537.36

Browser: Chrome 72

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
slice	332790.3 Ops/sec
spread operator	388623.4 Ops/sec
push apply into empty array	1195877.0 Ops/sec
Array.from	205533.0 Ops/sec
Object.values	71295.5 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)