Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36
Chrome 75
Mac OS X 10.14.6
Desktop
5 years ago
Test name Executions per second
undefined 5601726.5 Ops/sec
typeof 15617361.0 Ops/sec
in 15403138.0 Ops/sec
hasOwnProperty 13793346.0 Ops/sec
bool 15390803.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool