Run results for: JavaScript assignment vs Object.assign performance vs Spread performance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.167 YaBrowser/22.7.5.1018 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 22

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Equal	1128618000.0 Ops/sec
Object.assign	4516596.0 Ops/sec
Spread	1745644.0 Ops/sec

Tests:

Equal
const firstObject = { sampleData: ()=>{return 1+1;} } const secondObject = { moreData: 'foo bar' } let finalObject = {}; finalObject['firstObject'] = firstObject.sampleData; finalObject['secondObject'] = secondObject.moreData;
Object.assign
const firstObject = { sampleData: ()=>{return 1+1;} } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);
Spread
const firstObject = { sampleData: ()=>{return 1+1;} } const secondObject = { moreData: 'foo bar' } const finalObject = {...firstObject, ...secondObject};

Run results for: JavaScript assignment vs Object.assign performance vs Spread performance

Equal

Object.assign

Spread