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

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; CPH2339) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.5249.126 Mobile Safari/537.36 OPR/72.3.3767.68685

Browser: Opera Mobile 72

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Using the spread operator	1127505.0 Ops/sec
Using Object.assign	2819484.0 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);

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

Using the spread operator

Using Object.assign