Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36 Edg/94.0.992.47
Chrome 94
Windows
Desktop
2 years ago
Test name Executions per second
undefined 2816322.0 Ops/sec
typeof 7714634.5 Ops/sec
in 7545734.5 Ops/sec
hasOwnProperty 6979710.5 Ops/sec
bool 7711436.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool