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
5 years ago
Test name Executions per second
undefined 2458064.0 Ops/sec
typeof 9584310.0 Ops/sec
in 8600430.0 Ops/sec
hasOwnProperty 8419584.0 Ops/sec
bool 9119789.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool