Run results for: Slice vs Splice vs Shift

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/121.0.6167.138 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 121

Operating system: iOS 16.3

Device Platform: Mobile

Date tested: 2 years ago

array.splice()

4.1M/s

array.slice()

4.0M/s

array.shift()

2.1M/s

View exact numbers

Test name	Executions per second
✓ array.splice()	4,118,613 Ops/sec
array.slice()	3,971,604 Ops/sec
array.shift()	2,108,440 Ops/sec

Script Preparation code:

var array = [1, 2, 3, 4, 5, 6, 7, 8]
var itemsToRemove = 2

Tests:

array.slice()
array = array.slice(2)
array.splice()
array.splice(0, itemsToRemove)
array.shift()
for (let i = 0 ; i < itemsToRemove ; i++) array.shift()

Run results for: Slice vs Splice vs Shift

Compares the speed for removing 2 items from the beginning of an array

array.slice()

array.splice()

array.shift()