Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:60.0) Gecko/20100101 Firefox/60.0
Firefox 60
Windows
Desktop
6 years ago
Test name Executions per second
undefined 120350208.0 Ops/sec
typeof 339723840.0 Ops/sec
in 178322224.0 Ops/sec
hasOwnProperty 175581840.0 Ops/sec
bool 331464480.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool