Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.124 Safari/537.36 Edg/102.0.1245.44
Chrome 102
Windows
Desktop
2 years ago
Test name Executions per second
undefined 3916402.5 Ops/sec
typeof 12214956.0 Ops/sec
in 12575860.0 Ops/sec
hasOwnProperty 11045160.0 Ops/sec
bool 12781577.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool