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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.170 Safari/537.36

Browser: Chrome 66

Operating system: Mac OS X 10.12.6

Device Platform: Other

Date tested: 6 years ago

Test name	Executions per second
Array.prototype.concat	133137.8 Ops/sec
spread operator	8777.3 Ops/sec

Script Preparation code:

var arr = Array(100).fill([{n: ''}]);

Tests:

Array.prototype.concat
var params = Array(1000).fill([{n: ''}]); var other = arr.concat(params);
spread operator
var params = Array(1000).fill([{n: ''}]); var other = arr.push(...params);