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/63.0.3239.132 Safari/537.36
Chrome 63
Windows
Other
2025 years ago
Test name Executions per second
undefined 3945042.2 Ops/sec
typeof 12912926.0 Ops/sec
in 11743607.0 Ops/sec
hasOwnProperty 11510854.0 Ops/sec
bool 12886167.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool