Run results for: spread vs concat vs unshift for arrays

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36

Browser: Chrome 76

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 4 years ago

Script Preparation code:

var array = [1,2,3,4,5,6,7,8,9];
var array2 = [1,1,1];

Tests: