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

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.1.0; Nexus 6P Build/OPM3.171019.013) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.123 Mobile Safari/537.36

Browser: Chrome Mobile 64

Operating system: Android 8.1.0

Device Platform: Nexus 6P

Date tested: 2024 years ago

Test name	Executions per second
Array.prototype.concat	569719.3 Ops/sec
spread operator	60508.5 Ops/sec
array.push	1200640.0 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