Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36
Chrome 89
Mac OS X 10.15.5
Desktop
3 years ago
Test name Executions per second
undefined 3049787.8 Ops/sec
typeof 8676433.0 Ops/sec
in 8621801.0 Ops/sec
hasOwnProperty 8136865.0 Ops/sec
bool 9173765.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool