Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36
Chrome 89
Mac OS X 11.1.0
Desktop
3 years ago
Test name Executions per second
undefined 4905474.0 Ops/sec
typeof 14294610.0 Ops/sec
in 14311920.0 Ops/sec
hasOwnProperty 12165730.0 Ops/sec
bool 14112100.0 Ops/sec
Object.prototype.hasOwnProperty 2369717.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

  • Object.prototype.hasOwnProperty