MeasureThat.net

Run results for: key exists: key in object vs !!object[key]

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36
Chrome 70
Mac OS X 10.14.0
Desktop
6 years ago
Test name Executions per second
key in object 6845598.5 Ops/sec
!!object[key] 7531414.0 Ops/sec
Script Preparation code:
Tests:

  • key in object

  • !!object[key]

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