Run results for: arr unshift vs push + reverse (small array)

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_8_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6.6 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 15

Operating system: iOS 15.8.3

Device Platform: Mobile

Date tested: one year ago

unshift

681K/s

push + reverse

20/s

View exact numbers

Test name	Executions per second
✓ unshift	681,022 Ops/sec
push + reverse	20 Ops/sec

Script Preparation code:

var arr = [10];

Tests:

unshift
for (let i = 0; i < 10; i++){ arr.unshift(i); }
push + reverse
for (let i = 0; i < 10; i++){ arr.push(i); } arr.reverse();