JavaScript spread operator vs Object.assign existing vs Object.assign new performance

3 months ago
User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36
Test name Executions per second
Using the spread operator 3138295.0 Ops/sec
Using Object.assign 7437841.0 Ops/sec
Using Object.assign for new object 6722897.0 Ops/sec
Tests:
  • Using the spread operator

  • Using Object.assign

  • Using Object.assign for new object

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