Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.72 Safari/537.36
Chrome 90
Linux
Desktop
3 years ago
Test name Executions per second
undefined 5281959.0 Ops/sec
typeof 15785878.0 Ops/sec
in 15728553.0 Ops/sec
hasOwnProperty 13240844.0 Ops/sec
bool 15718959.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool


;