Run results for: array[array.length - 1] vs array.at(-1) v2

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/136.2 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 18

Operating system: iOS 18.3.2

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
array[array.length - 1]	456637088.0 Ops/sec
array.at(-1)	483425184.0 Ops/sec
array[array.length - 1] fn	427288032.0 Ops/sec
array.at(-1) fn	394820736.0 Ops/sec

Script Preparation code:

var array = [1, 2, 3];

function last1(array) {
    return array[array.length - 1]
}

function last2(array) {
    return array.at(-1)
}

Tests:

array[array.length - 1]
var d = array[array.length - 1];
array.at(-1)
var z = array.at(-1);
array[array.length - 1] fn
var x = last1(array);
array.at(-1) fn
var y = last2(array);

Run results for: array[array.length - 1] vs array.at(-1) v2

array[array.length - 1]

array.at(-1)

array[array.length - 1] fn

array.at(-1) fn