Run results for: Creating arrays with specified length

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser: Chrome 87

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Array Constructor	4008855.2 Ops/sec
Array.from	694161.4 Ops/sec
Setting length manually	4848290.5 Ops/sec
Inserting a value in the last index	3871614.8 Ops/sec

Script Preparation code:

var size = 15;

Tests:

Array Constructor
const array = new Array(size);
Array.from
const array = Array.from({length: size});
Setting length manually
const array = []; array.length = size;
Inserting a value in the last index
const array = []; array[size - 1] = undefined;