MeasureThat.net

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

Object lookup performance

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36
Chrome 111
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
undefined 10391974.0 Ops/sec
typeof 28945272.0 Ops/sec
in 28846120.0 Ops/sec
hasOwnProperty 25095666.0 Ops/sec
bool 28803180.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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