Run results for: Array Concat vs (Push + Spread) vs Spread

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36

Browser: Chrome 89

Operating system: Mac OS X 11.2.0

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

var arr1 = ["hello", "world", "test"];
var arr2 = [];
for (let i = 0; i < 500; i++) {
	arr2.push(Math.random());
}

Tests: