Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36
Chrome 87
Windows
Desktop
3 years ago
Test name Executions per second
undefined 3065580.5 Ops/sec
typeof 9055331.0 Ops/sec
in 8915179.0 Ops/sec
hasOwnProperty 8119538.5 Ops/sec
bool 8832294.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool