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_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.70 Safari/537.36
Chrome 78
Mac OS X 10.14.5
Desktop
5 years ago
Test name Executions per second
undefined 5055009.0 Ops/sec
typeof 14103148.0 Ops/sec
in 14156762.0 Ops/sec
hasOwnProperty 12233707.0 Ops/sec
bool 12932539.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

;