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/64.0.3282.140 Safari/537.36 Edge/17.17134
Edge 17.17134
Windows
Desktop
6 years ago
Test name Executions per second
undefined 12273372.0 Ops/sec
typeof 90402624.0 Ops/sec
in 23336176.0 Ops/sec
hasOwnProperty 26230808.0 Ops/sec
bool 88734112.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool