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

Run details:

User agent: Mozilla/5.0 (Linux; Android 15; ASUS_AI2302 Build/AQ3A.240812.002) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/136.0.7103.60 Mobile Safari/537.36

Browser: Chrome Mobile 136

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Array.prototype.concat	6281264.5 Ops/sec
spread operator	25661734.0 Ops/sec
Array.prototype.flat	2989285.2 Ops/sec

Tests:

Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Array.prototype.flat
var params = [ "hello", true, 7 ]; var other = [1, 2, params].flat()

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

Compare the new ES6 spread operator with the traditional concat() method

Array.prototype.concat

spread operator

Array.prototype.flat