Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Chrome 80
Mac OS X 10.15.3
Desktop
4 years ago
Test name Executions per second
undefined 4799019.5 Ops/sec
typeof 14726037.0 Ops/sec
in 14374809.0 Ops/sec
hasOwnProperty 13048911.0 Ops/sec
bool 14172327.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool