Run results for: set array index: slice vs Object.assign

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 131

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

splice

7.9M/s

Object.assign

459K/s

View exact numbers

Test name	Executions per second
✓ splice	7,920,754 Ops/sec
Object.assign	459,370 Ops/sec

Tests:

splice
var index = 2; var array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]; var output = [ ...array.slice(0, index), 10, ...array.slice(index + 1) ];
Object.assign
var array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]; var output = Object.assign([], array, {2: 10});