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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.4.1

Device Platform: Mobile

Date tested: 2 years ago

array.at(-1)

21.6M/s

array[array.length - 1]

11.6M/s

View exact numbers

Test name	Executions per second
✓ array.at(-1)	21,601,226 Ops/sec
array[array.length - 1]	11,558,818 Ops/sec

Script Preparation code:

var array = [1,2,3];

Tests:

array[array.length - 1]
var d = array[array.length - 1];
array.at(-1)
var z = array.at(-1);