Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36
Chrome 90
Linux
Desktop
3 years ago
Test name Executions per second
undefined 3212353.0 Ops/sec
typeof 11376717.0 Ops/sec
in 15764679.0 Ops/sec
hasOwnProperty 14445900.0 Ops/sec
bool 15920308.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool