Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
Chrome 87
Mac OS X 10.14.6
Desktop
4 years ago
Test name Executions per second
undefined 4572987.0 Ops/sec
typeof 15794632.0 Ops/sec
in 15938371.0 Ops/sec
hasOwnProperty 13267123.0 Ops/sec
bool 15632807.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool