Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.192 Safari/537.36
Chrome 88
Windows
Desktop
3 years ago
Test name Executions per second
undefined 3401755.8 Ops/sec
typeof 9781481.0 Ops/sec
in 9862545.0 Ops/sec
hasOwnProperty 8620105.0 Ops/sec
bool 9639830.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool