MeasureThat.net

Run results for: undefined vs. typeof vs. in vs. hasOwnProperty

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.135 Safari/537.36
Chrome 84
Windows 7
Desktop
4 years ago
Test name Executions per second
undefined 2915895.0 Ops/sec
typeof 8045422.5 Ops/sec
in 8035399.0 Ops/sec
hasOwnProperty 7397355.0 Ops/sec
bool 8075104.5 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool