Run results for: Array.prototype.concat vs spread operator on NodeList 2 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36

Browser: Chrome 92

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
slice	633381.5 Ops/sec
spread operator	656011.9 Ops/sec
push apply into empty array	1897127.0 Ops/sec
Array.from	525760.5 Ops/sec
Object.values	113277.2 Ops/sec
A-Push Apply reuse Array	1907509.9 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)
A-Push Apply reuse Array
var arr = []; arr.push.apply(arr, dom)

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