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; rv:109.0) Gecko/20100101 Firefox/118.0
Firefox 118
Windows
Desktop
one year ago
Test name Executions per second
undefined 368406688.0 Ops/sec
typeof 381620384.0 Ops/sec
in 366317088.0 Ops/sec
hasOwnProperty 772576832.0 Ops/sec
bool 833356544.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool