Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.183 Safari/537.36
Chrome 86
Mac OS X 10.15.7
Desktop
4 years ago
Test name Executions per second
undefined 4952854.0 Ops/sec
typeof 14889477.0 Ops/sec
in 14371617.0 Ops/sec
hasOwnProperty 10760833.0 Ops/sec
bool 14471271.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool