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_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.119 Safari/537.36
Chrome 64
Mac OS X 10.13.3
Other
2025 years ago
Test name Executions per second
undefined 4265751.0 Ops/sec
typeof 13268482.0 Ops/sec
in 11811909.0 Ops/sec
hasOwnProperty 12096453.0 Ops/sec
bool 13330244.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

;