Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36 OPR/83.0.4254.62
Opera 83
Windows
Desktop
2 years ago
Test name Executions per second
undefined 4354944.0 Ops/sec
typeof 11599522.0 Ops/sec
in 11740091.0 Ops/sec
hasOwnProperty 10792188.0 Ops/sec
bool 11247354.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool