Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36
Chrome 71
Linux
Desktop
5 years ago
Test name Executions per second
undefined 5023379.0 Ops/sec
typeof 15795582.0 Ops/sec
in 15069800.0 Ops/sec
hasOwnProperty 14906905.0 Ops/sec
bool 15838634.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool