Run results for: Array 2000 spread vs concat

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0

Browser: Firefox 123

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Concat

141K/s

Concat from empty

83K/s

Spread

49K/s

View exact numbers

Script Preparation code:

var a = Array.from({ length: 2000 }, (_, index) => index);
var b = Array.from({ length: 2000 }, (_, index) => 2000 - index);

Tests: