Run results for: .concat vs. spread

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.123 Safari/537.36

Browser: Chrome 79

Operating system: Mac OS X 10.13.6

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
.concat	3171957.0 Ops/sec
spread	5418086.0 Ops/sec

Script Preparation code:

var arr1 = [1,2,3];
var arr2 = [4,5,6];

Tests: