Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36
Chrome 75
Windows
Desktop
5 years ago
Test name Executions per second
immutable with concat 2261459.5 Ops/sec
direct mutation with splice + spread 325934.8 Ops/sec
Tests:
  • immutable with concat

  • direct mutation with splice + spread