Run details:
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.9 Safari/537.36
Chrome 62
Windows
Desktop
5 years ago
Test name Executions per second
immutable with concat 1609932.1 Ops/sec
direct mutation with splice + spread 2008199.9 Ops/sec
Tests:
  • immutable with concat

  • direct mutation with splice + spread