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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:125.0) Gecko/20100101 Firefox/125.0

Browser: Firefox 125

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
array[array.length - 1]	850274432.0 Ops/sec
array.at(-1)	551232960.0 Ops/sec

Script Preparation code:

var array = [1,2,3];

AخA
 
var array = [1,2,3];

Tests:

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