Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 16_0_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Mobile/15E148 Safari/604.1
Mobile Safari 16
iOS 16.0.2
Mobile
2 years ago
Test name Executions per second
undefined 8994991.0 Ops/sec
typeof 27021732.0 Ops/sec
in 25892536.0 Ops/sec
hasOwnProperty 25078212.0 Ops/sec
bool 25596330.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool