Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36
Chrome 89
Mac OS X 10.13.6
Desktop
3 years ago
Test name Executions per second
undefined 5034414.0 Ops/sec
typeof 14476441.0 Ops/sec
in 14855080.0 Ops/sec
hasOwnProperty 12606412.0 Ops/sec
bool 14408027.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool