Run results for: spread vs concat vs unshift

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; Redmi Note 5 Pro) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Mobile Safari/537.36

Browser: Chrome Mobile 84

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Script Preparation code:

var array = [1,2,3];

Tests: