Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Chrome 108
Mac OS X 10.15.6
Desktop
one year ago
Test name Executions per second
undefined 5475118.0 Ops/sec
typeof 15842384.0 Ops/sec
in 15949822.0 Ops/sec
hasOwnProperty 13686250.0 Ops/sec
bool 15425246.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool