MeasureThat.net

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

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36
Chrome 84
Mac OS X 10.14.6
Desktop
4 years ago
Test name Executions per second
undefined 4161081.8 Ops/sec
typeof 12366647.0 Ops/sec
in 12326639.0 Ops/sec
hasOwnProperty 11299434.0 Ops/sec
truthy 12397018.0 Ops/sec
local undef 6269650.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • truthy

  • local undef

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