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_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36
Chrome 79
Mac OS X 10.15.2
Desktop
4 years ago
Test name Executions per second
undefined 4774514.5 Ops/sec
typeof 14189286.0 Ops/sec
in 14339190.0 Ops/sec
hasOwnProperty 12683814.0 Ops/sec
bool 14352256.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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