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

Run details:

User agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.143 Safari/537.36 Vivaldi/1.95.1077.45

Browser: Chrome 64

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Using the spread operator	1161973.0 Ops/sec
Using Object.assign	888500.9 Ops/sec

Tests:

Using the spread operator
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);