MeasureThat.net

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

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.0 Safari/605.1.15
Safari 15
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
undefined 3272554.0 Ops/sec
typeof 9645884.0 Ops/sec
in 9845790.0 Ops/sec
hasOwnProperty 9476693.0 Ops/sec
bool 9841499.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

;