MeasureThat.net

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

Object lookup performance

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.135 Safari/537.36
Chrome 84
Windows
Desktop
4 years ago
Test name Executions per second
undefined 4482802.5 Ops/sec
typeof 13190251.0 Ops/sec
in 13262971.0 Ops/sec
hasOwnProperty 11789356.0 Ops/sec
bool 13069814.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool