Run results for: concat vs unshift vs spread (huge arrays)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:143.0) Gecko/20100101 Firefox/143.0

Browser: Firefox 143

Operating system: Windows

Device Platform: Desktop

Date tested: 10 months ago

unshift

1.1M/s

concat

58/s

spread

9/s

View exact numbers

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

var array = new Array(1000).fill(1);

Tests: