Run results for: Array concat vs spread operator vs push vs object assign

Run details:

User agent: Mozilla/5.0 (Linux; U; Android 10; MI 8 Lite Build/QKQ1.190910.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.114 Mobile Safari/537.36 OPR/62.1.2254.60552

Browser: Opera Mobile 62

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Array.prototype.concat	1958610.0 Ops/sec
spread operator	8334900.0 Ops/sec
Push	6814881.0 Ops/sec
Object assign	279509.5 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 ]
Push
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].push(...params);
Object assign
var params = [ "hello", true, 7 ]; var other = Object.assign([], params);

Run results for: Array concat vs spread operator vs push vs object assign

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

Array.prototype.concat

spread operator

Push

Object assign