Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36
Chrome 79
Linux
Desktop
4 years ago
Test name Executions per second
undefined 3582556.8 Ops/sec
typeof 9995309.0 Ops/sec
in 9938084.0 Ops/sec
hasOwnProperty 8108021.0 Ops/sec
bool 12525566.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool