MeasureThat.net

Run results for: undefined vs. typeof vs. in vs. hasOwnProperty vs exists vs double bang

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/95.0.4638.54 Safari/537.36
Chrome 95
Windows
Desktop
3 years ago
Test name Executions per second
undefined 6428334.0 Ops/sec
typeof 17800306.0 Ops/sec
in 17784860.0 Ops/sec
hasOwnProperty 16038807.0 Ops/sec
double bang 17628164.0 Ops/sec
exists 17782116.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • double bang

  • exists

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