Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0
Firefox 64
Windows
Desktop
5 years ago
Test name Executions per second
undefined 95588240.0 Ops/sec
typeof 226092784.0 Ops/sec
in 119839720.0 Ops/sec
hasOwnProperty 123277112.0 Ops/sec
bool 234640096.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool