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 3060081.8 Ops/sec
typeof 8612627.0 Ops/sec
in 6997450.0 Ops/sec
hasOwnProperty 6893079.5 Ops/sec
bool 6547163.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool