MeasureThat.net

Run results for: undefined vs. typeof vs. in vs. hasOwnProperty

Object lookup performance

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Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36
Chrome 64
Windows 7
Other
2025 years ago
Test name Executions per second
undefined 3771832.8 Ops/sec
typeof 11403597.0 Ops/sec
in 10742600.0 Ops/sec
hasOwnProperty 10505935.0 Ops/sec
bool 11337432.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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