Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 15_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6.1 Mobile/15E148 Safari/604.1
Mobile Safari 15
iOS 15.6.1
Mobile
2 years ago
Test name Executions per second
undefined 1343299.1 Ops/sec
typeof 3765437.8 Ops/sec
in 3873941.8 Ops/sec
hasOwnProperty 3829865.0 Ops/sec
bool 3611740.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool