Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36
Chrome 90
Mac OS X 10.14.6
Desktop
3 years ago
Test name Executions per second
undefined 5968634.5 Ops/sec
typeof 17553814.0 Ops/sec
in 17326816.0 Ops/sec
hasOwnProperty 14570825.0 Ops/sec
bool 17417280.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool