Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36
Chrome 98
Windows
Desktop
2 years ago
Test name Executions per second
undefined 5463094.5 Ops/sec
typeof 15882773.0 Ops/sec
in 15927698.0 Ops/sec
hasOwnProperty 14279273.0 Ops/sec
bool 15965262.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool