Run results for: spread vs concat vs unshift

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) QtWebEngine/5.15.6 Chrome/87.0.4280.144 Safari/537.36

Browser: Chrome 87

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var array = [1,2,3];

Tests: