Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36
Chrome 93
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
undefined 4516038.0 Ops/sec
typeof 12577542.0 Ops/sec
in 12603537.0 Ops/sec
hasOwnProperty 10867728.0 Ops/sec
bool 12639205.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool