Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36
Chrome 70
Windows
Desktop
6 years ago
Test name Executions per second
undefined 3105820.2 Ops/sec
typeof 8916452.0 Ops/sec
in 8013702.5 Ops/sec
hasOwnProperty 7734077.0 Ops/sec
bool 9700262.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool