Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36
Chrome 94
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
undefined 5560981.5 Ops/sec
typeof 16125301.0 Ops/sec
in 15900625.0 Ops/sec
hasOwnProperty 13580210.0 Ops/sec
bool 16130614.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool