Run results for: spread vs concat vs unshift for arrays

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36

Browser: Chrome 90

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

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

Tests: