Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36
Chrome 77
Mac OS X 10.14.6
Desktop
5 years ago
Test name Executions per second
Using the spread operator 21782528.0 Ops/sec
Using Object.assign 6085571.5 Ops/sec
Using Object.assign no mutation 5183958.5 Ops/sec
Tests:
  • Using the spread operator

  • Using Object.assign

  • Using Object.assign no mutation