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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.3 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Using the spread operator with constant inside	20906868.0 Ops/sec
Using Object.assign	11405674.0 Ops/sec
Using the spread operator	10418629.0 Ops/sec

Tests:

Using the spread operator with constant inside
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { ...secondObject, __key: "a key", __src: "a src", };
Using Object.assign
const firstObject = { __key: "a key", __src: "a src", } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);
Using the spread operator
const firstObject = { __key: "a key", __src: "a src", } const secondObject = { moreData: 'foo bar' } const finalObject = { ...secondObject, ...firstObject };