MeasureThat.net

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

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36
Chrome 89
Linux
Desktop
3 years ago
Test name Executions per second
undefined 3200393.5 Ops/sec
typeof 9676214.0 Ops/sec
in 9754986.0 Ops/sec
hasOwnProperty 8885489.0 Ops/sec
truthy 9870796.0 Ops/sec
local undef 4776233.5 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • truthy

  • local undef

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