Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4315.5 Safari/537.36
Chrome 88
Windows
Desktop
4 years ago
Test name Executions per second
undefined 1331723.9 Ops/sec
typeof 3756545.5 Ops/sec
in 3802087.5 Ops/sec
hasOwnProperty 3448306.0 Ops/sec
bool 3785514.8 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool