Run results for: Array .concat() vs .unshift()

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Browser: Chrome 83

Operating system: Mac OS X 10.15.5

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
arr.unshift(42)	26330.9 Ops/sec
[42].concat(arr)	1664.0 Ops/sec

Script Preparation code:

var arr = []

AخA
 
var arr = []

Tests: