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_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
Chrome 63
Mac OS X 10.13.3
Other
2025 years ago
Test name Executions per second
undefined 2991150.5 Ops/sec
typeof 9428957.0 Ops/sec
in 8951637.0 Ops/sec
hasOwnProperty 8419382.0 Ops/sec
truthy 9289053.0 Ops/sec
local undef 4581698.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • truthy

  • local undef

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