Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36
Chrome 73
Mac OS X 10.13.6
Desktop
5 years ago
Test name Executions per second
undefined 3525026.2 Ops/sec
typeof 11575208.0 Ops/sec
in 11393560.0 Ops/sec
hasOwnProperty 11102338.0 Ops/sec
bool 12620635.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool