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_1) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0.1 Safari/605.1.15
Safari 12
Mac OS X 10.14.1
Desktop
5 years ago
Test name Executions per second
undefined 2595952.8 Ops/sec
typeof 8023344.0 Ops/sec
in 7951322.0 Ops/sec
hasOwnProperty 8045234.5 Ops/sec
bool 8079032.5 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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