Run results for: spread vs concat vs unshift

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; SM-G950F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.101 Mobile Safari/537.36

Browser: Chrome Mobile 75

Operating system: Android

Device Platform: Mobile

Date tested: 4 years ago

Script Preparation code:

var array = [1,2,3];

Tests: