Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
Chrome 87
Linux
Desktop
3 years ago
Test name Executions per second
undefined 5896902.5 Ops/sec
typeof 15341267.0 Ops/sec
in 15179819.0 Ops/sec
hasOwnProperty 14027532.0 Ops/sec
bool 15111730.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool