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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36

Browser: Chrome 66

Operating system: Mac OS X 10.13.4

Device Platform: Other

Date tested: 5 years ago

Test name	Executions per second
slice	181679.4 Ops/sec
spread operator	167057.8 Ops/sec
push apply into empty array	694577.9 Ops/sec
Array.from	139281.2 Ops/sec
Object.values	36432.2 Ops/sec

Website performance monitoring

Script Preparation code:

var children = document.body.children

Tests:

slice
var other = Array.prototype.slice.call(children);
spread operator
var other = [ ...children ]
push apply into empty array
var other = []; [].push.apply(other, children)
Array.from
var other = Array.from(children);
Object.values
var other = Object.values(children);