Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 16_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.4 Mobile/15E148 Safari/604.1
Mobile Safari 16
iOS 16.4
Mobile
one year ago
Test name Executions per second
undefined 7064267.5 Ops/sec
typeof 19495374.0 Ops/sec
in 19662878.0 Ops/sec
hasOwnProperty 18473518.0 Ops/sec
bool 18180114.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool