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/14.0 Safari/605.1.15
Safari 14
Mac OS X 10.15.7
Desktop
4 years ago
Test name Executions per second
undefined 4432021.0 Ops/sec
typeof 13077478.0 Ops/sec
in 13283569.0 Ops/sec
hasOwnProperty 13445172.0 Ops/sec
bool 13410338.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

;