Run results for: .unshift() vs .push() + .reverse()

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:145.0) Gecko/20100101 Firefox/145.0

Browser: Firefox 145

Operating system: Linux

Device Platform: Desktop

Date tested: 5 months ago

Test name	Executions per second
.unshift()	40051.0 Ops/sec
.push() + reverse()	509370.7 Ops/sec

Script Preparation code:

window.ELE_PER_CYCLE = 100;

Tests:

.unshift()
const reps = window.ELE_PER_CYCLE; const arr = []; for (let i = 0; i < reps; ++i) { arr.unshift(i); }
.push() + reverse()
const reps = window.ELE_PER_CYCLE; const arr = []; for (let i = 0; i < reps; ++i) { arr.push(i); } arr.reverse();