Run results for: Array.prototype.concat vs Spread operator

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36

Browser: Chrome 75

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Array.prototype.concat	287.9 Ops/sec
Spread operator	12702.3 Ops/sec

Tests:

Array.prototype.concat
const test = [].concat(Array(10000).fill('1')).concat(Array(100).fill('2'));
Spread operator
const test = [ ...Array(10000).fill('1'), ...Array(100).fill('2')];