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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/117.0

Browser: Firefox 117

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

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

Tests: