Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36
Chrome 80
Mac OS X 10.15.0
Desktop
4 years ago
Test name Executions per second
undefined 3697736.8 Ops/sec
typeof 11476251.0 Ops/sec
in 11479444.0 Ops/sec
hasOwnProperty 10172080.0 Ops/sec
bool 11483074.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool