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_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36
Chrome 78
Mac OS X 10.14.4
Desktop
5 years ago
Test name Executions per second
undefined 4118291.2 Ops/sec
typeof 12839205.0 Ops/sec
in 12073055.0 Ops/sec
hasOwnProperty 10097149.0 Ops/sec
bool 12251143.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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