Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36
Chrome 72
Mac OS X 10.14.3
Desktop
5 years ago
Test name Executions per second
undefined 5939935.5 Ops/sec
typeof 17682764.0 Ops/sec
in 16389872.0 Ops/sec
hasOwnProperty 16012384.0 Ops/sec
bool 17600274.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool