Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.192 Safari/537.36
Chrome 88
Mac OS X 11.2.0
Desktop
3 years ago
Test name Executions per second
undefined 4410836.5 Ops/sec
typeof 13498240.0 Ops/sec
in 13542825.0 Ops/sec
hasOwnProperty 11566603.0 Ops/sec
bool 13623024.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool