Run results for: Slice vs Splice vs Shift

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_5_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 12

Operating system: iOS 12.5.4

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
array.slice()	1412255.0 Ops/sec
array.splice()	1209009.0 Ops/sec
array.shift()	821830.6 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()