MeasureThat.net

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

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Safari/605.1.15
Safari 14
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
undefined 4538325.0 Ops/sec
typeof 14587281.0 Ops/sec
in 14554365.0 Ops/sec
hasOwnProperty 14380804.0 Ops/sec
bool 14559612.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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