Run results for: JavaScript spread operator vs Object.assign performance (clone)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Using Object.assign

69.2M/s

Using the spread operator

67.5M/s

View exact numbers

Test name	Executions per second
✓ Using Object.assign	69,172,248 Ops/sec
Using the spread operator	67,481,704 Ops/sec

Tests:

Using the spread operator
const firstObject = { a: 1, b: 2, c: 3, d: 4 } const finalObject = { ...firstObject };
Using Object.assign
const firstObject = { a: 1, b: 2, c: 3, d: 4 } const finalObject = Object.assign({}, firstObject);