Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36
Chrome 100
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
undefined 5147049.0 Ops/sec
typeof 15854420.0 Ops/sec
in 15635159.0 Ops/sec
hasOwnProperty 13778119.0 Ops/sec
bool 15645401.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool