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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36

Browser: Chrome 91

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
slice	503444.8 Ops/sec
spread operator	489903.8 Ops/sec
push apply into empty array	1472001.0 Ops/sec
Array.from	419219.6 Ops/sec
concat	878343.3 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);
concat
var _ref; var other = (_ref = []).concat.apply(_ref, dom);