Run results for: spread vs concat vs unshift

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0

Browser: Firefox 59

Operating system: Windows

Device Platform: Other

Date tested: 6 years ago

Script Preparation code:

var array = [1,2,3];

Tests: