MeasureThat.net

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

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/125.0.0.0 Safari/537.36
Chrome 125
Windows
Desktop
5 months ago
Test name Executions per second
undefined 3892558.8 Ops/sec
typeof 9829193.0 Ops/sec
in 9710331.0 Ops/sec
operator 9667523.0 Ops/sec
bool 9238418.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • operator

  • bool

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