Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 14_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Mobile/15E148 Safari/604.1
Mobile Safari 14
iOS 14.7.1
Mobile
3 years ago
Test name Executions per second
undefined 7363214.5 Ops/sec
typeof 21360026.0 Ops/sec
in 20840732.0 Ops/sec
hasOwnProperty 20476872.0 Ops/sec
bool 19156584.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool