Hi @felicianoangelo
Concerning the Largest Contentful Paint (LCP) kindly find the below comment:
- It's a key performance metric that measures the time it takes for the largest visible content element (e.g., image, text block) on a webpage to load.
- A long LCP can significantly impact user experience, and Dynatrace (via the Ruxit agent) can help identify and diagnose issues related to it.
- If you're experiencing issues with LCP through Dynatrace Ruxit agent, here are the steps to help address and fix the problem:
- Identify LCP Element Using Dynatrace
Dynatrace's Ruxit agent tracks performance data, including LCP.
For LCP issues diagnosis :
- Access Real User Monitoring (RUM) in Dynatrace: RUM provides detailed data about your website’s performance from actual user sessions.
- Locate LCP Data: Look for LCP information within the RUM dashboard. You can find the "Largest Contentful Paint" metric under the page performance section or the “Web” performance monitoring data.
- Analyze the Problematic Pages: Identify which specific page or element is responsible for the slow LCP.
LCP Element Optimization:
Once you identify the element that contributes to the LCP issue, the next step is to optimize it. Common elements that contribute to LCP issues include images, videos, or large text blocks.
For Images:
- Image Optimization: Ensure that images are properly optimized in terms of size and format (e.g., using WebP or responsive images).
- Lazy Loading: Implement lazy loading for images that are not immediately visible on the page.
- Serve Images in Proper Dimensions: Ensure images are not unnecessarily large for the viewport size.
For Fonts:
- Font Loading: Avoid render-blocking fonts. Use font-display: swap to ensure text remains visible while fonts are loading.
For CSS/JS:
- Critical CSS: Minimize the critical CSS and load non-essential styles asynchronously.
- JavaScript Optimizations: Avoid long-running scripts that block the main thread during page load. Defer or async non-critical scripts.
- Check for Server or Network Issues
- Server Response Time: A slow server response time can increase the time it takes to load the page. Dynatrace can help identify backend performance issues (e.g., database queries, API calls).
- CDN Optimization: If using a CDN, make sure it's properly configured to deliver content efficiently, especially for large files like images.
- Use Performance Budgets
Set performance budgets within Dynatrace for LCP to monitor and alert if the threshold is breached. This allows proactive management of LCP performance over time.
- Review the Loading Sequence
Dynatrace provides insights into how elements load on the page. Make sure that LCP elements are prioritized and loaded earlier. Avoid blocking resources like large images, fonts, or JavaScript that delay the display of the LCP element.
- Monitor After Implementing Changes
After applying optimizations, use Dynatrace to monitor the improvements in LCP. This can be done by tracking the performance in RUM and the LCP score over time to ensure the optimizations were effective.
- Common Causes of Poor LCP
- Slow server response times
- Large or unoptimized images
- Render-blocking JavaScript or CSS
- Slow font loading
- Third-party scripts or heavy ads affecting load time
By identifying the LCP element and addressing its loading bottlenecks, you can improve both your user experience and your LCP score.
Conclusion:
- The issue is a reason of any of the highlighted factors or combined which require optimization from development team, therefore it's not a Dynatrace agent.
- Performing waterfall analysis and looking into the stack traces will help you pinpoint the Root Cause and proceed with the applicable remediation.
Hoping it helps.
KR,
Peter
MaciejNeumann
