Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36
Chrome 95
Mac OS X 10.15.3
Desktop
3 years ago
Test name Executions per second
undefined 5323707.5 Ops/sec
typeof 14717325.0 Ops/sec
in 16973544.0 Ops/sec
hasOwnProperty 14916054.0 Ops/sec
bool 17366634.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool