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 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.64 Safari/537.36 Edg/101.0.1210.53
Chrome 101
Windows
Desktop
2 years ago
Test name Executions per second
undefined 6433273.5 Ops/sec
typeof 17364436.0 Ops/sec
in 17283886.0 Ops/sec
hasOwnProperty 16380473.0 Ops/sec
bool 17204836.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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