Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36
Chrome 96
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
undefined 5619552.0 Ops/sec
typeof 15692100.0 Ops/sec
in 15548974.0 Ops/sec
hasOwnProperty 13723746.0 Ops/sec
bool 15349852.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool