Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.64 Safari/537.36
Chrome 101
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
undefined 9490413.0 Ops/sec
typeof 26955624.0 Ops/sec
in 26834620.0 Ops/sec
hasOwnProperty 23624266.0 Ops/sec
bool 26920696.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool