Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36
Chrome 95
Windows
Desktop
3 years ago
Test name Executions per second
undefined 2775999.0 Ops/sec
typeof 7100872.0 Ops/sec
in 4322441.5 Ops/sec
hasOwnProperty 3194251.8 Ops/sec
bool 6184808.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool