Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36
Chrome 81
Mac OS X 10.15.4
Desktop
4 years ago
Test name Executions per second
undefined 5149534.0 Ops/sec
typeof 15373660.0 Ops/sec
in 15314090.0 Ops/sec
hasOwnProperty 13601480.0 Ops/sec
bool 15198380.0 Ops/sec
Object.prototype.hasOwnProperty 2699220.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

  • Object.prototype.hasOwnProperty