MeasureThat.net

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

Object lookup performance

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:81.0) Gecko/20100101 Firefox/81.0
Firefox 81
Mac OS X 10.15
Desktop
4 years ago
Test name Executions per second
undefined 148692640.0 Ops/sec
typeof 282904832.0 Ops/sec
in 190131168.0 Ops/sec
hasOwnProperty 203612624.0 Ops/sec
bool 291626912.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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