Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36
Chrome 72
Mac OS X 10.12.6
Desktop
5 years ago
Test name Executions per second
undefined 4749422.5 Ops/sec
typeof 13865150.0 Ops/sec
in 13062331.0 Ops/sec
hasOwnProperty 13281200.0 Ops/sec
bool 12222095.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool