Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36
Chrome 93
Linux
Desktop
3 years ago
Test name Executions per second
undefined 4768346.0 Ops/sec
typeof 12726701.0 Ops/sec
in 12494845.0 Ops/sec
hasOwnProperty 11525906.0 Ops/sec
bool 11997631.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool