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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0

Browser: Firefox 133

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Using Object.assign

45.6M/s

Using the spread operator

19.5M/s

View exact numbers

Test name	Executions per second
✓ Using Object.assign	45,554,700 Ops/sec
Using the spread operator	19,474,884 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);