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_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36
Chrome 70
Mac OS X 10.14.0
Desktop
6 years ago
Test name Executions per second
undefined 4381815.5 Ops/sec
typeof 15048651.0 Ops/sec
in 13790364.0 Ops/sec
hasOwnProperty 13474543.0 Ops/sec
bool 15009146.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

;