Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36 OPR/67.0.3575.137
Opera 67
Windows
Desktop
4 years ago
Test name Executions per second
undefined 3337960.0 Ops/sec
typeof 10036607.0 Ops/sec
in 10001988.0 Ops/sec
hasOwnProperty 8972831.0 Ops/sec
bool 10007589.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool