Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36
Chrome 80
Mac OS X 10.15.4
Desktop
4 years ago
Test name Executions per second
undefined 4802945.0 Ops/sec
typeof 15526271.0 Ops/sec
in 15332045.0 Ops/sec
hasOwnProperty 13597075.0 Ops/sec
bool 15315172.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool