Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36
Chrome 76
Mac OS X 10.14.5
Desktop
5 years ago
Test name Executions per second
undefined 2558417.5 Ops/sec
typeof 9174114.0 Ops/sec
in 9235695.0 Ops/sec
hasOwnProperty 8198689.5 Ops/sec
bool 10106907.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool