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/83.0.4103.116 Safari/537.36 OPR/69.0.3686.77
Opera 69
Windows
Desktop
4 years ago
Test name Executions per second
undefined 1770533.8 Ops/sec
typeof 5306099.5 Ops/sec
in 5190832.0 Ops/sec
hasOwnProperty 4677798.0 Ops/sec
bool 5158966.5 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool