Run results for: concat string vs array push

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36

Browser: Chrome 67

Operating system: Mac OS X 10.13.3

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
concat string	12104640.0 Ops/sec
array push	5249951.0 Ops/sec

Script Preparation code:

var arr = [];
var mxname = 'mxname';

Tests: