Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.115 Safari/537.36
Chrome 102
Windows
Desktop
one year ago
Test name Executions per second
undefined 4037989.0 Ops/sec
typeof 11980280.0 Ops/sec
in 11917380.0 Ops/sec
hasOwnProperty 10888170.0 Ops/sec
bool 11968250.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool