Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.193 Safari/537.36 Edg/86.0.622.68
Chrome 86
Windows
Desktop
4 years ago
Test name Executions per second
undefined 4329113.0 Ops/sec
typeof 13144641.0 Ops/sec
in 13198443.0 Ops/sec
hasOwnProperty 12252385.0 Ops/sec
bool 13319414.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool


;