Run results for: Copy Array

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/136.2 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 18

Operating system: iOS 18.3.2

Device Platform: Mobile

Date tested: one year ago

concat

497/s

Spread

167/s

Slice

66/s

Slice(0)

64/s

View exact numbers

Test name	Executions per second
✓ concat	497 Ops/sec
Spread	167 Ops/sec
Slice	66 Ops/sec
Slice(0)	64 Ops/sec

Script Preparation code:

var len = 1000*1000;
var arr = new Array(len);

Tests:

Spread
var arr2 = [...arr];
Slice
var arr2 = arr.slice();
Slice(0)
var arr2 = arr.slice(0);
concat
var arr2 = arr.concat();

Run results for: Copy Array

Speed of array cloning

Spread

Slice

Slice(0)

concat