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_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36
Chrome 78
Mac OS X 10.13.6
Desktop
4 years ago
Test name Executions per second
undefined 5192626.0 Ops/sec
typeof 13656337.0 Ops/sec
in 13461964.0 Ops/sec
hasOwnProperty 12482604.0 Ops/sec
bool 13526603.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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