DNS resolution chart is wrong

[Sane-Sunil]

Summary

DNS resolution times are occasionally displayed as negative values or null in the dashboard charts.

Steps to Reproduce

1. Open the dashboard
2. Navigate to the DNS resolution chart
3. Observe the graph over time

Expected Behavior

DNS resolution time should always be greater than or equal to 0 ms.

Actual Behavior

• Some data points appear below 0 ms
• Graph shows null value

Impact

• Misleading metrics
• Reduces confidence in measurement accuracy
• Makes it harder to interpret network performance

Possible Causes (Speculation)

• Incorrect duration calculation
• Chart smoothing or interpolation artifact
• Null value not being properly handled

Suggested Fix

• Ensure DNS resolution durations are always clamped to ≥ 0
• Review calculation logic for start/end timestamps
• Disable or adjust chart smoothing if applicable
• Show null value as 0 or as any other issue in network

Environment

• OS: Windows 11 (amd64)
• Browser: Edge, Chrome
• Package: netmon windows amd64
• Release: v1.1.0