Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36
Chrome 88
Linux
Desktop
3 years ago
Test name Executions per second
undefined 4415351.5 Ops/sec
typeof 13455804.0 Ops/sec
in 13484156.0 Ops/sec
hasOwnProperty 12289436.0 Ops/sec
bool 13496775.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool