Run details:
Mozilla/5.0 (iPad; CPU OS 13_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.2 Mobile/15E148 Safari/604.1
Mobile Safari 13
iOS 13.6.1
Tablet
4 years ago
Test name Executions per second
undefined 5464319.5 Ops/sec
typeof 15210076.0 Ops/sec
in 15503707.0 Ops/sec
hasOwnProperty 15494702.0 Ops/sec
bool 15605591.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool