Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Safari/605.1.15
Safari 18
Mac OS X 10.15.7
Desktop
2 months ago
Test name Executions per second
undefined 11109104.0 Ops/sec
typeof 31603956.0 Ops/sec
in 31429536.0 Ops/sec
hasOwnProperty 31246438.0 Ops/sec
bool 31622028.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool