Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36
Chrome 61
Mac OS X 10.12.6
Other
7 years ago
Test name Executions per second
undefined 3448116.0 Ops/sec
typeof 9847809.0 Ops/sec
in 9009096.0 Ops/sec
hasOwnProperty 8944360.0 Ops/sec
bool 6379270.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool