Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36
Chrome 76
Mac OS X 10.14.5
Desktop
5 years ago
Test name Executions per second
undefined 3939484.8 Ops/sec
typeof 11574097.0 Ops/sec
in 12305865.0 Ops/sec
hasOwnProperty 10766487.0 Ops/sec
bool 12424069.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool