Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Chrome 70
Mac OS X 10.12.6
Desktop
6 years ago
Test name Executions per second
undefined 3309449.2 Ops/sec
typeof 10668698.0 Ops/sec
in 9914955.0 Ops/sec
hasOwnProperty 9586725.0 Ops/sec
bool 10724727.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool