Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.72 Safari/537.36
Chrome 69
Linux
Desktop
6 years ago
Test name Executions per second
undefined 3587518.8 Ops/sec
typeof 11294189.0 Ops/sec
in 10633092.0 Ops/sec
hasOwnProperty 10547960.0 Ops/sec
bool 11267418.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool