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

Object lookup performance

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36
Chrome 136
Mac OS X 10.15.7
Desktop
11 months ago
Test name Executions per second
undefined 251509056.0 Ops/sec
typeof 234705344.0 Ops/sec
in 227821408.0 Ops/sec
hasOwnProperty 136110496.0 Ops/sec
bool 212333632.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool