Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36
Chrome 96
Windows
Desktop
2 years ago
Test name Executions per second
undefined 3891436.5 Ops/sec
typeof 10858600.0 Ops/sec
in 11154831.0 Ops/sec
hasOwnProperty 9728076.0 Ops/sec
bool 11424090.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool