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 2997676.8 Ops/sec
typeof 7510384.0 Ops/sec
in 6712207.5 Ops/sec
hasOwnProperty 6892941.0 Ops/sec
bool 6481553.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool