Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36
Chrome 79
Linux
Desktop
4 years ago
Test name Executions per second
undefined 3592961.0 Ops/sec
typeof 10062867.0 Ops/sec
in 9979430.0 Ops/sec
hasOwnProperty 8083592.0 Ops/sec
bool 9955110.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool