Run results for: Spread operator vs Object.assign vs Object.create

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/127.0 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 17

Operating system: iOS 17.5.1

Device Platform: Mobile

Date tested: 2 years ago

Test Spread operator

27.2M/s

Test Object.assign

5.7M/s

Test Object.create

3.4M/s

View exact numbers

Test name	Executions per second
✓ Test Spread operator	27,176,738 Ops/sec
Test Object.assign	5,714,520 Ops/sec
Test Object.create	3,432,792 Ops/sec

Script Preparation code:

for (i = 0; i < 10; i++) {}

Tests:

Test Spread operator
const firstObject = { sampleData: 'Hello world', sampleMethod: () => { return true; } }; const secondObject = {...firstObject};
Test Object.create
const firstObject = { sampleData: 'Hello world', sampleMethod: () => { return true; } }; const secondObject = Object.create(Object.getPrototypeOf(firstObject), Object.getOwnPropertyDescriptors(firstObject));
Test Object.assign
const firstObject = { sampleData: 'Hello world', sampleMethod: () => { return true; } }; const secondObject = Object.assign({}, firstObject); Object.setPrototypeOf(secondObject, Object.getPrototypeOf(firstObject));