Run results for: Array.prototype.slice vs spread operator - objects 22

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36

Browser: Chrome 85

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Array.prototype.slice	7.6 Ops/sec
spread operator	7.7 Ops/sec

Script Preparation code:

    function fromNumberToObject(id = 0) {
      return {
        id,
        value: id + id,
        name: 'example',
      };
    }
    var list = [...Array(99999999).keys()].map(fromNumberToObject);

​x
 
    function fromNumberToObject(id = 0) {      return {        id,        value: id + id,        name: 'example',      };    }    var list = [...Array(99999999).keys()].map(fromNumberToObject);​​

Tests:

Array.prototype.slice
const test = list.slice();
const test = list.slice();
spread operator
const test = [...list];
const test = [...list];

Run results for: Array.prototype.slice vs spread operator - objects 22

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

Array.prototype.slice

spread operator