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_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36
Chrome 79
Mac OS X 10.15.2
Desktop
4 years ago
Test name Executions per second
undefined 5549981.0 Ops/sec
typeof 15844057.0 Ops/sec
in 15877162.0 Ops/sec
hasOwnProperty 13996902.0 Ops/sec
bool 15983207.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

;