Run details:
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36
Chrome 54
Windows 7
Other
8 years ago
Test name Executions per second
undefined 3704564.2 Ops/sec
typeof 9997605.0 Ops/sec
in 9655830.0 Ops/sec
hasOwnProperty 9693108.0 Ops/sec
bool 10204185.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool