Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.16 Safari/537.36
Chrome 99
Linux
Desktop
2 years ago
Test name Executions per second
undefined 3796850.5 Ops/sec
typeof 11619553.0 Ops/sec
in 11182733.0 Ops/sec
hasOwnProperty 10256454.0 Ops/sec
bool 11345248.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool