Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36
Chrome 87
Windows 7
Desktop
3 years ago
Test name Executions per second
undefined 3305267.5 Ops/sec
typeof 9242733.0 Ops/sec
in 9235915.0 Ops/sec
hasOwnProperty 8483065.0 Ops/sec
bool 9256435.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool