Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36
Chrome 72
Mac OS X 10.14.2
Desktop
5 years ago
Test name Executions per second
immutable with concat 2436385.5 Ops/sec
direct mutation with splice + spread 3782162.8 Ops/sec
Tests:
  • immutable with concat

  • direct mutation with splice + spread