Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36
Chrome 93
Windows
Desktop
3 years ago
Test name Executions per second
undefined 3520094.0 Ops/sec
typeof 9487145.0 Ops/sec
in 9589095.0 Ops/sec
hasOwnProperty 8182912.0 Ops/sec
bool 9266799.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool