Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.102 Safari/537.36 OPR/90.0.4480.84
Opera 90
Windows
Desktop
2 years ago
Test name Executions per second
undefined 2999776.5 Ops/sec
typeof 8944527.0 Ops/sec
in 8938230.0 Ops/sec
hasOwnProperty 8930484.0 Ops/sec
bool 10135037.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool