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_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36

Browser: Chrome 74

Operating system: Mac OS X 10.13.6

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
slice	501620.8 Ops/sec
spread operator	462660.1 Ops/sec
push apply into empty array	1435189.1 Ops/sec
Array.from	326598.6 Ops/sec
Object.values	92453.7 Ops/sec
For of push	523420.5 Ops/sec
Array.contact	3169521.2 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);
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);

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