Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36
Chrome 92
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
undefined 4946671.5 Ops/sec
typeof 13462260.0 Ops/sec
in 13593790.0 Ops/sec
hasOwnProperty 11886493.0 Ops/sec
bool 13582092.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool