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_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.119 Safari/537.36
Chrome 72
Mac OS X 10.14.3
Desktop
5 years ago
Test name Executions per second
undefined 5490675.0 Ops/sec
typeof 17102582.0 Ops/sec
in 16010044.0 Ops/sec
hasOwnProperty 15655678.0 Ops/sec
bool 17284858.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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