What is TTFB by error clicks
TTFB by error clicks breakdown shows how Time to First Byte (TTFB) differs for sessions where users encounter error clicks compared to those without them.
An error click happens when a user interacts with an element, but the outcome fails — such as clicking a broken link, submitting a form that throws an error, or pressing a button that doesn’t respond as expected. While these issues are functional, slow server responses (high TTFB) can worsen the experience by making errors feel even slower or more frustrating.
This breakdown helps you determine whether backend delays are increasing error frequency or making error experiences worse.
TTFB by error clicks sample
Should you worry
In a healthy view, TTFB values for error click sessions look similar to those without errors. Errors may still happen, but they stem from broken logic, integrations, or user input — not server response time.
A healthy setup typically shows:
TTFB consistently under 800ms across both groups.
Fast responses even when clicks trigger an error.
Errors tied to functionality, not performance.
If TTFB is stable, error clicks are not performance-related.
Unhealthy TTFB by error clicks
If error click sessions consistently show higher TTFB values, server delays may be making failures worse or more common.
Common causes include:
Slow form submissions timing out before validation.
Server-side errors surfacing after long response delays.
Unoptimized APIs slowing down user interactions.
Dynamic rendering bottlenecks making errors take longer to appear.
Here, high TTFB compounds the frustration of error clicks by dragging out failed flows.
Resolving unhealthy TTFB by error clicks
Go-to action plan to resolve an unhealthy TTFB by error clicks:
Ask Uxi to analyze your TTFB by error clicks values and suggest improvements.
Use Filters to compare TTFB in error click sessions by device, geography, or traffic type.
Simulate TTFB of the suspected breakdown to see if fixing it will resolve the TTFB by error clicks. If yes, this is where the resolution focus should be.
Use an automated optimization tool like Navigation AI to improve your TTFB by error clicks values.
Once you’ve improved TTFB, set an alert to be the first to know if it starts worsening again.
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