Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36
Chrome 90
Mac OS X 10.14.6
Desktop
3 years ago
Test name Executions per second
undefined 4640204.5 Ops/sec
typeof 13692362.0 Ops/sec
in 13723746.0 Ops/sec
hasOwnProperty 12115523.0 Ops/sec
bool 13676504.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool