Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36
Chrome 70
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
immutable with concat 4001210.0 Ops/sec
direct mutation with splice + spread 4120238.8 Ops/sec
Tests:
  • immutable with concat

  • direct mutation with splice + spread