Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36
Chrome 73
Windows 7
Desktop
5 years ago
Test name Executions per second
immutable with concat 1443708.0 Ops/sec
direct mutation with splice + spread 317623.2 Ops/sec
Tests:
  • immutable with concat

  • direct mutation with splice + spread