Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36
Chrome 75
Mac OS X 10.14.2
Desktop
5 years ago
Test name Executions per second
immutable with concat 1195001.0 Ops/sec
direct mutation with splice + spread 226988.6 Ops/sec
Tests:
  • immutable with concat

  • direct mutation with splice + spread