Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36
Chrome 71
Mac OS X 10.12.6
Desktop
5 years ago
Test name Executions per second
undefined 4043064.2 Ops/sec
typeof 13013280.0 Ops/sec
in 12288381.0 Ops/sec
hasOwnProperty 11887835.0 Ops/sec
bool 13146406.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool


;