Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36
Chrome 80
Windows
Desktop
4 years ago
Test name Executions per second
undefined 3007837.5 Ops/sec
typeof 9073212.0 Ops/sec
in 9116572.0 Ops/sec
hasOwnProperty 7763078.5 Ops/sec
bool 8169366.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool