Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36
Chrome 89
Linux
Desktop
3 years ago
Test name Executions per second
undefined 4725563.5 Ops/sec
typeof 14108048.0 Ops/sec
in 14225756.0 Ops/sec
hasOwnProperty 12602470.0 Ops/sec
bool 14135699.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool