Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:64.0) Gecko/20100101 Firefox/64.0
Firefox 64
Mac OS X 10.13
Desktop
5 years ago
Test name Executions per second
undefined 146916352.0 Ops/sec
typeof 296041184.0 Ops/sec
in 222385760.0 Ops/sec
hasOwnProperty 222248224.0 Ops/sec
bool 296283264.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool