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

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.0.0; VS988 Build/OPR1.170623.032; en-us) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Mobile Safari/537.36 Puffin/7.7.7.31115AP

Browser: Puffin 7

Operating system: Android 8.0.0

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
Array.prototype.concat	654210.8 Ops/sec
spread operator	133468.5 Ops/sec
array.push	3170444.0 Ops/sec

Script Preparation code:

var arr = Array(100).fill([{n: ''}]);

Tests:

Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = arr.concat(params);
spread operator
var params = [ "hello", true, 7 ]; var other = [ ...arr, ...params ];
array.push
arr.push("hello", true, 7); var other = arr;

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

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

Array.prototype.concat

spread operator

array.push