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 15_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.2 Mobile/15E148 Safari/604.1
Mobile Safari 15
iOS 15.2.1
Mobile
2 years ago
Test name Executions per second
undefined 5165494.0 Ops/sec
typeof 13795119.0 Ops/sec
in 12501385.0 Ops/sec
hasOwnProperty 13153543.0 Ops/sec
bool 14566952.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

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