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 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36
Chrome 68
Linux
Desktop
6 years ago
Test name Executions per second
undefined 4681878.0 Ops/sec
typeof 17374808.0 Ops/sec
in 16120701.0 Ops/sec
hasOwnProperty 15574837.0 Ops/sec
double bang 17338540.0 Ops/sec
exists 17179898.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • double bang

  • exists

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