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

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.80 Safari/537.36
Chrome 86
Mac OS X 10.15.7
Desktop
4 years ago
Test name Executions per second
Using the spread operator 17402444.0 Ops/sec
Using Object.assign 5141542.5 Ops/sec
Tests:

  • Using the spread operator

    AخA
     
    const firstObject = {}
    const secondObject = { moreData: 'foo bar' }
    const finalObject = {
        ...firstObject,
        ...secondObject
    };

  • Using Object.assign

     
    const firstObject = {}
    const secondObject = { moreData: 'foo bar' }
    const finalObject = Object.assign(firstObject, secondObject);