Run results for: Array.prototype.concat vs spread operator

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 YaBrowser/19.9.0.1760 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 19

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
slice	11869950.0 Ops/sec
spread operator	11501310.0 Ops/sec
concat into empty array	4204213.0 Ops/sec
Array.from	4249467.0 Ops/sec

Script Preparation code:

var myArray = [ "hello", true, 7 ]

Tests:

slice
var other = myArray.slice();
spread operator
var other = [ ...myArray ]
concat into empty array
[].concat(myArray);
Array.from
var other = Array.from(myArray);

Run results for: Array.prototype.concat vs spread operator

Compare the new ES6 spread operator with the traditional concat() method

slice

spread operator

concat into empty array

Array.from