Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.83 Safari/537.36
Chrome 99
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
undefined 6128056.0 Ops/sec
typeof 17449908.0 Ops/sec
in 17423086.0 Ops/sec
hasOwnProperty 14794090.0 Ops/sec
bool 17428830.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool