Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36
Chrome 99
Windows
Desktop
2 years ago
Test name Executions per second
undefined 4088489.8 Ops/sec
typeof 11413721.0 Ops/sec
in 11426134.0 Ops/sec
hasOwnProperty 10023081.0 Ops/sec
bool 11466077.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool