Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36
Chrome 81
Linux
Desktop
4 years ago
Test name Executions per second
undefined 5125059.5 Ops/sec
typeof 14775380.0 Ops/sec
in 14511189.0 Ops/sec
hasOwnProperty 11756124.0 Ops/sec
bool 14429290.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool