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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser: Chrome 116

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
array[len]	9007.0 Ops/sec
array.at(-1)	14612.2 Ops/sec

Script Preparation code:

var array = [1,2,3];
var len = array.len;
var n = 1000;

AخA
 
var array = [1,2,3];var len = array.len;var n = 1000;

Tests:

let t = 0;
for(let i = 0; i < n; i++) {
	t+= array[len - 1];
}

​x
 
let t = 0;for(let i = 0; i < n; i++) {    t+= array[len - 1];}​

let t = 0;
for(let i = 0; i < n; i++) {
	t+= array.at(-1);
}

 
let t = 0;for(let i = 0; i < n; i++) {    t+= array.at(-1);} 