DNS Latency Comparison Calculator accuracy and testing

Formula source

• Saved milliseconds = current latency - new latency. Effective lookups remove cached lookups from total lookup volume.

Test cases

Known limitations

• This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
• Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

• Inputs are user-entered because pricing, deadlines, policies, and technical limits vary.
• Calculations run locally in your browser and do not store passwords, incidents, network designs, or security program data.
• This is planning math, not security assurance, legal advice, or a substitute for testing.

Unit handling

• Current DNS Latency accepts values in ms.
• Alternative DNS Latency accepts values in ms.
• Requests or Page Views accepts numeric values.
• Lookups per Request accepts numeric values.
• Cache Hit Rate accepts values in %.
• Latency Saved per Lookup is displayed in ms.
• Total Saved Time is displayed in hr.
• Resolver Improvement is displayed as a percentage.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Percent outputs are displayed with two decimal places.
• Input precision follows configured step values where provided.

Version history

Change log