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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 11

Operating system: iOS 11.3

Device Platform: iPhone

Date tested: 6 years ago

Test name	Executions per second
Array.prototype.concat	486840.1 Ops/sec
spread operator	556644.4 Ops/sec

Script Preparation code:

var array1 = Array(400).fill().map(() => Math.round(Math.random() * 40));
var array2 = Array(400).fill().map(() => Math.round(Math.random() * 40));

Tests: