Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
Chrome 87
Windows
Desktop
4 years ago
Test name Executions per second
undefined 3527097.5 Ops/sec
typeof 10971949.0 Ops/sec
in 10891452.0 Ops/sec
hasOwnProperty 9700885.0 Ops/sec
bool 10766649.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool