Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36
Chrome 77
Linux
Desktop
5 years ago
Test name Executions per second
Using the spread operator 9898395.0 Ops/sec
Using Object.assign 3956864.0 Ops/sec
Using Object.assign no mutation 3446983.2 Ops/sec
Tests:
  • Using the spread operator

  • Using Object.assign

  • Using Object.assign no mutation