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_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.0 Safari/605.1.15
Safari 15
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
undefined 9405947.0 Ops/sec
typeof 26169084.0 Ops/sec
in 26041106.0 Ops/sec
hasOwnProperty 25609274.0 Ops/sec
truthy 26193902.0 Ops/sec
local undef 13944701.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • truthy

  • local undef

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