Run results for: spread vs concat vs unshift vs push+sort

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36

Browser: Chrome 80

Operating system: Mac OS X 10.15.4

Device Platform: Desktop

Date tested: 4 years ago

Script Preparation code:

var array = new Array();
for (let i = 1; i <= 1000; i++) {
  array.push(i);
}

Tests: