MeasureThat.net

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

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Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
Mobile Safari 11
iOS 11.3
Mobile
6 years ago
Test name Executions per second
Using the spread operator 292353.2 Ops/sec
Using Object.assign 503474.5 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);