Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75 Safari/537.36
Chrome 68
Linux
Desktop
6 years ago
Test name Executions per second
undefined 5457379.0 Ops/sec
typeof 19129764.0 Ops/sec
in 17578840.0 Ops/sec
hasOwnProperty 17278714.0 Ops/sec
bool 19369010.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool