Run details:
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:79.0) Gecko/20100101 Firefox/79.0
Firefox 79
Ubuntu
Desktop
4 years ago
Test name Executions per second
undefined 71732240.0 Ops/sec
typeof 184210496.0 Ops/sec
in 99714696.0 Ops/sec
hasOwnProperty 112421632.0 Ops/sec
bool 184490656.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool