Run results for: array.prototype.at() vs array[array.length - 1]

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/111.0.5563.72 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 111

Operating system: iOS 16.3

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
array.prototype.at()	27283356.0 Ops/sec
array[array.length - 1]	15079171.0 Ops/sec

Script Preparation code:

var array = [0, 1, 2, 3];

Tests:

array.prototype.at()
let lastWithAtArray = array.at(-1)
array[array.length - 1]
let lastWithLength = array[array.length - 1]

Run results for: array.prototype.at() vs array[array.length - 1]

which one is faster for reaching last item of an array

array.prototype.at()

array[array.length - 1]