Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36
Chrome 80
Windows 7
Desktop
4 years ago
Test name Executions per second
undefined 2830742.5 Ops/sec
typeof 8534370.0 Ops/sec
in 8562339.0 Ops/sec
hasOwnProperty 7804100.5 Ops/sec
bool 8623863.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool