Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36
Chrome 86
Windows
Desktop
4 years ago
Test name Executions per second
undefined 3600892.2 Ops/sec
typeof 9882458.0 Ops/sec
in 10327450.0 Ops/sec
hasOwnProperty 9416902.0 Ops/sec
bool 10041100.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool