What is TTFB by screen resolution
TTFB by screen resolution shows the Time to First Byte (TTFB) value across different screen resolutions. While TTFB is mostly about server response, this lens can help uncover patterns tied to device types — since certain screen resolutions often correlate with particular hardware.
Only screen resolutions with actual traffic during the selected period are included.
For example, 1920×1080 might represent high-end desktops or mid-range laptops, while 1366×768 could be low-end devices or older machines — which might introduce latency for other reasons like background apps or antivirus filters.
Healthy TTFB by screen resolution sample
Should you worry
If TTFB by screen resolution is all green, you’re likely caching correctly and delivering fast responses to all users — regardless of device resolution.
Unhealthy TTFB by screen resolution sample
If your most popular screen resolutions show high TTFB, the issue could be:
Backend latency or cold start issues
No CDN caching or inconsistent edge coverage
Network conditions tied to specific device types
Resource contention on weaker devices (though that’s rare for TTFB)
Remember: High TTFB on common screen resolutions = bad first impressions and delayed rendering.
Resolving unhealthy TTFB by screen resolution
Go-to action plan to resolve an unhealthy TTFB by screen resolution:
Ask Uxi to analyze your TTFB by screen resolution values and suggest improvements.
Use Filters to inspect problematic resolutions, then check related lenses like TTFB by country or by connection type.
Simulate TTFB of the suspected lens to see if fixing it will resolve the TTFB by screen resolution. If yes, this is where the resolution focus should be.
Use an automated optimization tool like Navigation AI to improve your TTFB by screen resolution values.
Once you’ve improved TTFB, set an alert to be the first to know if it starts worsening again.
Try it yourself
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