Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/119.0.6045.169 Mobile/15E148 Safari/604.1
Chrome Mobile iOS 119
iOS 17.1
Mobile
one year ago
Test name Executions per second
undefined 7980623.0 Ops/sec
typeof 24015776.0 Ops/sec
in 24027614.0 Ops/sec
hasOwnProperty 23790588.0 Ops/sec
bool 23692106.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool