MeasureThat.net

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

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.120 Safari/537.36
Chrome 77
Windows 7
Desktop
5 years ago
Test name Executions per second
undefined 3974411.5 Ops/sec
typeof 11250632.0 Ops/sec
in 11055499.0 Ops/sec
hasOwnProperty 10077587.0 Ops/sec
bool 11226200.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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