Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/93.0.4577.39 Mobile/15E148 Safari/604.1
Chrome Mobile iOS 93
iOS 14.2
Mobile
3 years ago
Test name Executions per second
undefined 6521052.5 Ops/sec
typeof 17776868.0 Ops/sec
in 18028530.0 Ops/sec
hasOwnProperty 18118254.0 Ops/sec
bool 17965022.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool