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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/113.0.5672.121 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 113

Operating system: iOS 16.4

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Array.prototype.concat	40309120.0 Ops/sec
spread operator	432011900.0 Ops/sec
Push	15108180.0 Ops/sec
Object assign	5084220.0 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