MeasureThat.net

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

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Mobile/15E148 Safari/604.1
Mobile Safari 17
iOS 17.5.1
Mobile
2 months ago
Test name Executions per second
undefined 10240495.0 Ops/sec
typeof 25701230.0 Ops/sec
in 25360814.0 Ops/sec
hasOwnProperty 24596264.0 Ops/sec
bool 24342282.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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