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/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36 Edg/97.0.1072.55
Chrome 97
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
undefined 5389280.0 Ops/sec
typeof 13780148.0 Ops/sec
in 15215055.0 Ops/sec
hasOwnProperty 12958621.0 Ops/sec
bool 15145133.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool