Run results for: last item in array [length-1] vs slice(-1) vs pop

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

index[length - 1]

155.6M/s

Array.slice(-1)

56.8M/s

View exact numbers

Test name	Executions per second
✓ index[length - 1]	155,631,248 Ops/sec
Array.slice(-1)	56,764,428 Ops/sec

Script Preparation code:

const elements = document.all;
window.arr = Array.from(elements);

Tests: