Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 14_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1
Chrome Mobile iOS 87
iOS 14.3
Mobile
3 years ago
Test name Executions per second
undefined 1077140.9 Ops/sec
typeof 2997443.0 Ops/sec
in 3025266.2 Ops/sec
hasOwnProperty 2911149.2 Ops/sec
bool 2466692.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool