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

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
Chrome 121
Windows
Desktop
2 years ago
Test name Executions per second
undefined 7440731.0 Ops/sec
typeof 20021340.0 Ops/sec
in 20244816.0 Ops/sec
hasOwnProperty 18133332.0 Ops/sec
bool 19194742.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool