Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36
Chrome 89
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
undefined 4734979.5 Ops/sec
typeof 13820566.0 Ops/sec
in 13627285.0 Ops/sec
hasOwnProperty 11970377.0 Ops/sec
bool 13947814.0 Ops/sec
Object.prototype.hasOwnProperty 2566716.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

  • Object.prototype.hasOwnProperty