Run details:
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Chrome 69
Windows 7
Desktop
6 years ago
Test name Executions per second
undefined 3595820.5 Ops/sec
typeof 10438634.0 Ops/sec
in 9231807.0 Ops/sec
hasOwnProperty 8535189.0 Ops/sec
bool 10298541.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool