Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
Chrome 87
Mac OS X 11.1.0
Desktop
3 years ago
Test name Executions per second
undefined 3165877.0 Ops/sec
typeof 9784820.0 Ops/sec
in 9462446.0 Ops/sec
hasOwnProperty 8860148.0 Ops/sec
bool 9665496.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool