Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0
Firefox 66
Windows
Desktop
5 years ago
Test name Executions per second
undefined 102303736.0 Ops/sec
typeof 200839888.0 Ops/sec
in 150799280.0 Ops/sec
hasOwnProperty 151940208.0 Ops/sec
bool 199459632.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool