Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36
Chrome 96
Mac OS X 10.14.6
Desktop
2 years ago
Test name Executions per second
undefined 5819983.0 Ops/sec
typeof 16091050.0 Ops/sec
in 16009947.0 Ops/sec
hasOwnProperty 14097720.0 Ops/sec
bool 16127726.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool