Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36
Chrome 83
Mac OS X 10.14.6
Desktop
4 years ago
Test name Executions per second
undefined 2882817.0 Ops/sec
typeof 8595388.0 Ops/sec
in 8573274.0 Ops/sec
hasOwnProperty 7705480.5 Ops/sec
bool 8355752.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool