Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36
Chrome 79
Mac OS X 10.15.3
Desktop
4 years ago
Test name Executions per second
undefined 6837140.0 Ops/sec
typeof 19626402.0 Ops/sec
in 19612730.0 Ops/sec
hasOwnProperty 17333380.0 Ops/sec
bool 19712708.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool