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/67.0.3396.87 Safari/537.36
Chrome 67
Linux
Desktop
6 years ago
Test name Executions per second
undefined 3322182.8 Ops/sec
typeof 11875254.0 Ops/sec
in 10855266.0 Ops/sec
hasOwnProperty 10507757.0 Ops/sec
truthy 11767878.0 Ops/sec
local undef 5767260.5 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • truthy

  • local undef

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