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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36

Browser: Chrome 66

Operating system: Mac OS X 10.13.3

Device Platform: Other

Date tested: 6 years ago

Test name	Executions per second
Using the spread operator	1675102.0 Ops/sec
Using Object.assign	3066501.0 Ops/sec

Tests:

Using the spread operator
const firstObject = { test: 'Hello world', test1: "blah", test2: "ze" } const secondObject = { test1: 'La woopp', test2: 'te' } const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { test: 'Hello world', test1: "blah", test2: "ze" } const secondObject = { test1: 'La woopp', test2: 'te' } const finalObject = Object.assign(firstObject, secondObject);