Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Chrome 67
Mac OS X 10.13.6
Desktop
5 years ago
Test name Executions per second
immutable with concat 3258737.8 Ops/sec
direct mutation with splice + spread 3543930.0 Ops/sec
Tests:
  • immutable with concat

  • direct mutation with splice + spread