Run results for: arr.slice(-1)[0] vs arr[arr.length - 1]

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.128 Safari/537.36 OPR/75.0.3969.218 (Edition Yx 05)

Browser: Opera 75

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
arr.slice(-1)[0]	9459712.0 Ops/sec
arr[arr.length - 1]	6520159.0 Ops/sec

Script Preparation code:

var arr = Array(100000).fill(1);

Tests:

arr.slice(-1)[0]
arr.slice(-1)[0];
arr[arr.length - 1]
arr[arr.length - 1];