Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36
Chrome 58
Windows
Other
7 years ago
Test name Executions per second
undefined 4001970.2 Ops/sec
typeof 10456038.0 Ops/sec
in 9850395.0 Ops/sec
hasOwnProperty 9992386.0 Ops/sec
bool 10926831.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool