Run results for: array spread vs concat vs from vs slice - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser: Chrome 108

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Array.prototype.concat	61005300.0 Ops/sec
Array.prototype.from	1680217.0 Ops/sec
Array.prototype.slice	100835800.0 Ops/sec
spread operator	5070345.0 Ops/sec

Website performance monitoring

Tests:

Array.prototype.concat
const array = [1, 2] const newArray = array.concat()
Array.prototype.from
const array = [1, 2] const newArray = Array.from(array)
Array.prototype.slice
const array = [1, 2] const newArray = array.slice(0)
spread operator
const array = [1, 2] const newArray = [...array]