Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36
Chrome 89
Linux
Desktop
3 years ago
Test name Executions per second
undefined 4636277.5 Ops/sec
typeof 13783669.0 Ops/sec
in 13911547.0 Ops/sec
hasOwnProperty 11927105.0 Ops/sec
bool 13896065.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool