Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Safari/605.1.15
Safari 14
Mac OS X 10.15.6
Desktop
3 years ago
Test name Executions per second
undefined 3507350.2 Ops/sec
typeof 10526679.0 Ops/sec
in 10697195.0 Ops/sec
hasOwnProperty 10657802.0 Ops/sec
bool 10542455.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool