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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36

Browser: Chrome 66

Operating system: Mac OS X 10.13.3

Device Platform: Other

Date tested: 5 years ago

Test name	Executions per second
Array.prototype.concat	176111.4 Ops/sec
spread operator	12465.4 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);