Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36
Chrome 119
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
undefined 12014518.0 Ops/sec
typeof 33248934.0 Ops/sec
in 33445184.0 Ops/sec
hasOwnProperty 27319412.0 Ops/sec
bool 33016474.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool