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 10.14; rv:82.0) Gecko/20100101 Firefox/82.0
Firefox 82
Mac OS X 10.14
Desktop
3 years ago
Test name Executions per second
undefined 109845592.0 Ops/sec
typeof 205440880.0 Ops/sec
in 123960192.0 Ops/sec
hasOwnProperty 142821136.0 Ops/sec
bool 178531232.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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