Run details:
Mozilla/5.0 (iPhone; CPU OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/33.0 Mobile/15E148 Safari/605.1.15
Mobile Safari 14
iOS 14.2
Mobile
3 years ago
Test name Executions per second
undefined 3466864.0 Ops/sec
typeof 10124353.0 Ops/sec
in 10185784.0 Ops/sec
bool 10077610.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • bool