LCP
Largest Contentful Paint
3.0s
Needs Improvement
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Eliminate Render Blocking CSS
How to optimize dev01.chrisjahn.de
Generic SiteScore: 92/100Analyzed January 2026
Eliminate Render Blocking CSS
High Impact+15 points estimated
Why It Matters
Three CSS files are blocking page render for 1,330ms and delaying First Contentful Paint.
How to Fix
Inline critical CSS directly in the HTML <head> for above-the-fold content. Load non-critical CSS files (home.css, bundle.min.css) asynchronously using media='print' onload="this.media='all'". Combine the three CSS files into one to reduce HTTP requests.
0Good
What This Score Means
A score of 92 falls in the "Good" range (50-89). While it is better than poor (0-49), you should aim for 90+ to provide an optimal user experience and maximize SEO benefits.
This site is slower than approximately 35% of similar sites. The main issues affecting performance are image optimization, JavaScript execution time, and layout stability.
Addressing these issues could improve your conversion rate by 15-20% and boost your search engine rankings.
Core Web Vitals Analysis
INP
Interaction to Next Paint
35ms
Good
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.00
Good
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
Your website performs well overall with a score of 92/100, but there are some key optimizations that could make it even faster. The biggest issue is render-blocking CSS files that are delaying your page's initial display by about 1.3 seconds, particularly affecting how quickly content becomes visible to users. Additionally, your images are oversized for their display dimensions, wasting about 107 KB of bandwidth, and your LCP element needs a fetchpriority="high" attribute to load faster. The site also has a heavy network payload of nearly 11 MB, mainly from video files, which could impact users on slower connections.
Other Optimization Recommendations
Optimize Font Loading Chain
High Impact+12 points estimatedWhy It Matters:
Web fonts are loading in a 3-deep chain taking 830ms, creating the longest network dependency.
How to Fix:
Add <link rel='preload' as='font' type='font/woff2' crossorigin> for AlbertSans font files in the HTML head. Use font-display: swap in your CSS to prevent invisible text during font load. Consider subsetting fonts to reduce file sizes from 52KB+ to essential characters only.
Add LCP Image Priority Hint
Medium Impact+8 points estimatedWhy It Matters:
The LCP background image lacks fetchpriority=high, missing an opportunity to prioritize critical content loading.
How to Fix:
Add fetchpriority='high' to the background image URL in your CSS or convert to an <img> tag with the priority attribute. Ensure the LCP image is discoverable immediately by avoiding CSS background-image for critical content. Consider using a <picture> element with responsive sources.
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Related Performance Analyses
More Generic Speed Tests
Generic Performance Resources
Remove Unused JavaScript Code
Google Tag Manager scripts contain 139KB of unused code, slowing LCP by 600ms and wasting processing time.
Optimize Video File Caching
17MB of video content has zero cache lifetime, forcing full re-downloads on every visit and wasting 69MB of bandwidth.
Defer Render-Blocking JavaScript
JavaScript files are blocking initial page render, delaying FCP by 750ms and preventing users from seeing content.
Remove Unused CSS and JavaScript
136KB of unused JavaScript and 63KB of unused CSS waste bandwidth and slow down page parsing.
Frequently Asked Questions
Keep Your Site Fast After Optimization
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