Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Chrome 108
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
undefined 8814938.0 Ops/sec
typeof 26934890.0 Ops/sec
in 26965170.0 Ops/sec
hasOwnProperty 23465848.0 Ops/sec
bool 26821866.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool