Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36
Chrome 85
Linux
Desktop
4 years ago
Test name Executions per second
undefined 4601835.0 Ops/sec
typeof 13375878.0 Ops/sec
in 13424886.0 Ops/sec
hasOwnProperty 11937455.0 Ops/sec
bool 13491906.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool