Run results for: Add element at index 0 (Splice vs Spread vs unshift)

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.5.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.5.1

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Splice	12694501.0 Ops/sec
Unshift	16149980.0 Ops/sec
Spread	363280640.0 Ops/sec

Tests:

Splice
const testArray = [1, 2, 3, 4, 5, 6, 7]; testArray.splice(0, 0, 10);
Unshift
const testArray = [1, 2, 3, 4, 5, 6, 7]; testArray.unshift(10);
Spread
let testArray = [1, 2, 3, 4, 5, 6, 7]; testArray = [10, ...testArray];

Run results for: Add element at index 0 (Splice vs Spread vs unshift)

Splice

Unshift

Spread