Run results for: Copy Array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 OPR/39.0.2256.71

Browser: Opera 39

Operating system: Mac OS X 10.11.4

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
Spread	5.8 Ops/sec
Slice	165.0 Ops/sec
Slice(0)	162.0 Ops/sec
concat	167.9 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