Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36
Chrome 68
Mac OS X 10.13.6
Desktop
6 years ago
Test name Executions per second
undefined 3714198.0 Ops/sec
typeof 13422014.0 Ops/sec
in 10830158.0 Ops/sec
hasOwnProperty 4917098.0 Ops/sec
bool 12838606.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool