Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
Chrome 87
Mac OS X 10.15.4
Desktop
4 years ago
Test name Executions per second
undefined 4461127.0 Ops/sec
typeof 13182844.0 Ops/sec
in 13412884.0 Ops/sec
hasOwnProperty 11243828.0 Ops/sec
bool 13143958.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool