Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.193 Safari/537.36
Chrome 86
Mac OS X 10.15.7
Desktop
4 years ago
Test name Executions per second
undefined 5113261.0 Ops/sec
typeof 15259333.0 Ops/sec
in 15148533.0 Ops/sec
hasOwnProperty 11101681.0 Ops/sec
bool 15415948.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool