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

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Chrome 67
Mac OS X 10.13.5
Desktop
6 years ago
Test name Executions per second
Using the spread operator 2124158.5 Ops/sec
Using Object.assign 1568831.2 Ops/sec
Tests:

  • Using the spread operator

    AخA
     
    const firstObject = { sampleData: 'Hello world', b: 'foo', d: 'dummy' }
    const clone = { ...firstObject };

  • Using Object.assign

     
    const firstObject = { sampleData: 'Hello world', b: 'foo', d: 'dummy' }
    const clone = Object.assign({}, firstObject);