Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.102 Safari/537.36 Edg/104.0.1293.70
Chrome 104
Windows
Desktop
2 years ago
Test name Executions per second
undefined 7158604.5 Ops/sec
typeof 19398782.0 Ops/sec
in 19652758.0 Ops/sec
hasOwnProperty 18095254.0 Ops/sec
bool 19481464.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool