Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36
Chrome 104
Windows
Desktop
2 years ago
Test name Executions per second
undefined 3933476.2 Ops/sec
typeof 10887507.0 Ops/sec
in 10997686.0 Ops/sec
hasOwnProperty 9391962.0 Ops/sec
bool 10947581.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool