Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.1 Safari/605.1.15
Safari 13
Mac OS X 10.15.5
Desktop
4 years ago
Test name Executions per second
undefined 3807503.2 Ops/sec
typeof 10470708.0 Ops/sec
in 10559731.0 Ops/sec
hasOwnProperty 10530942.0 Ops/sec
bool 10543602.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool


;