Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36
Chrome 101
Windows
Desktop
2 years ago
Test name Executions per second
undefined 4697942.5 Ops/sec
typeof 13671083.0 Ops/sec
in 13649095.0 Ops/sec
hasOwnProperty 11806953.0 Ops/sec
bool 13685928.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool