Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36 Edg/92.0.902.73
Chrome 92
Windows
Desktop
3 years ago
Test name Executions per second
undefined 4917799.0 Ops/sec
typeof 14098168.0 Ops/sec
in 14243240.0 Ops/sec
hasOwnProperty 12952333.0 Ops/sec
bool 14108168.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool