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/101.0.4951.67 Safari/537.36 OPR/87.0.4390.58
Opera 87
Windows
Desktop
2 years ago
Test name Executions per second
undefined 3952575.5 Ops/sec
typeof 10593184.0 Ops/sec
in 10601383.0 Ops/sec
hasOwnProperty 9806223.0 Ops/sec
double bang 10597716.0 Ops/sec
exists 10617251.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • double bang

  • exists

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