Run results for: concat 2 arrays: Array.prototype.concat vs spread operator

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.1.0; Redmi 5 Plus) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.80 Mobile Safari/537.36

Browser: Chrome Mobile 70

Operating system: Android 8.1.0

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
Array.prototype.concat	498050.0 Ops/sec
spread operator	672184.3 Ops/sec

Script Preparation code:

var a = [ 1, 2, 3 ];
var b = [ 4, 5, 6 ];

Tests: