Run results for: Last item in array Slice vs Length - 1 vs At -1

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser: Chrome 111

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Script Preparation code:

var arr = [];
for (let i = 0; i < 1000000; i++) {
  arr.push(i);
}

Tests:

Slice
for (let i = 0; i < 10000; i++) { const v = arr.slice(-1)[0]; }
Length - 1
for (let i = 0; i < 10000; i++) { const v = arr[arr.length - 1]; }
At ES2022 method -1 index
for (let i = 0; i < 10000; i++) { const v = arr.at(-1); }