Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36
Chrome 59
Windows 7
Other
7 years ago
Test name Executions per second
undefined 2991173.0 Ops/sec
typeof 7385050.0 Ops/sec
in 7132774.5 Ops/sec
hasOwnProperty 7103102.5 Ops/sec
bool 7368938.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool