Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4216.0 Safari/537.36
Chrome 86
Mac OS X 10.15.6
Desktop
4 years ago
Test name Executions per second
undefined 3848242.5 Ops/sec
typeof 11461267.0 Ops/sec
in 11130770.0 Ops/sec
hasOwnProperty 10187684.0 Ops/sec
bool 11327514.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool