Run results for: Create 2D Array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 11.1.0

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
While Loop with declaration	303659.9 Ops/sec
While Loop with Array.from	303098.6 Ops/sec
While Loop with Push and Array.From	274984.6 Ops/sec
While Loop with Push	283912.2 Ops/sec
Array.from with map	218462.0 Ops/sec

Script Preparation code:

var size = 15;

Tests:

While Loop with declaration
const array = []; array.length = size; let index = array.length; while (index-- > 0) { const temp = []; temp.length = size; array[index] = temp; }
While Loop with Array.from
const array = []; array.length = size; let index = array.length; const temp = []; temp.length = size; while (index-- > 0) array[index] = Array.from(temp);
While Loop with Push and Array.From
const array = []; array.length = size; let index = array.length; const temp = []; temp.length = size; while (index-- > 0) array.push(Array.from(temp));
While Loop with Push
const array = []; array.length = size; let index = size; while (index-- > 0) { const temp = []; temp.length = size; array.push(temp); }
Array.from with map
const array = Array.from(Array(size), () => { const temp = []; temp.length = size; return temp; });