Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.72 Safari/537.36
Chrome 90
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
undefined 5026420.5 Ops/sec
typeof 13667153.0 Ops/sec
in 15833531.0 Ops/sec
hasOwnProperty 13339949.0 Ops/sec
bool 16014740.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool