Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0
Firefox 59
Windows 7
Other
6 years ago
Test name Executions per second
undefined 141031248.0 Ops/sec
typeof 259565296.0 Ops/sec
in 172945936.0 Ops/sec
hasOwnProperty 171761376.0 Ops/sec
bool 257839680.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool