Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.146 Safari/537.36
Chrome 88
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
undefined 5791806.5 Ops/sec
typeof 18703528.0 Ops/sec
in 18678270.0 Ops/sec
hasOwnProperty 16465160.0 Ops/sec
bool 18700138.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool