Run results for: Splice vs Spread vs Unshift vs Concat to insert at beginning of array (fixed from slice)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0

Browser: Firefox 109

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var array = Array.from({ length: 100 }).map((val, i) => i);

Tests: