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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36
Chrome 110
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
undefined 10287357.0 Ops/sec
typeof 29275112.0 Ops/sec
in 29339788.0 Ops/sec
hasOwnProperty 25359068.0 Ops/sec
double bang 29279944.0 Ops/sec
exists 29307418.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • double bang

  • exists

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