Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36
Chrome 85
Windows 7
Desktop
4 years ago
Test name Executions per second
undefined 2152902.5 Ops/sec
typeof 5989815.5 Ops/sec
in 6003943.5 Ops/sec
hasOwnProperty 5527536.0 Ops/sec
bool 5956134.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool