Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 14_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Mobile/15E148 Safari/604.1
Mobile Safari 14
iOS 14.4.2
Mobile
3 years ago
Test name Executions per second
undefined 7456660.0 Ops/sec
typeof 21884116.0 Ops/sec
in 22761194.0 Ops/sec
hasOwnProperty 21693190.0 Ops/sec
bool 20853832.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool