LCP
Largest Contentful Paint
4.1s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize LCP Image Loading
How to optimize aeroxon.de
Generic SiteScore: 71/100Analyzed January 2026
Optimize LCP Image Loading
High Impact+10 points estimated
Why It Matters
The LCP element has a 2-second render delay and lacks priority hints, making the page appear slow to load.
How to Fix
Add fetchpriority='high' attribute to the hero banner image. Preload the LCP image using <link rel='preload' as='image'> in the document head. Optimize the banner images by converting to WebP format and serving appropriately sized versions.
0Needs Improvement
What This Score Means
A score of 71 falls in the "Needs Improvement" 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
55ms
Good
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.22
Needs Improvement
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This website has below-average performance with a score of 71/100, primarily due to significant layout stability issues and slow loading times. The biggest problem is excessive layout shifting (CLS score of 0.217) caused by images in the banner slider lacking explicit width and height dimensions, which makes content jump around as the page loads. The site also suffers from a slow Largest Contentful Paint of 4.1 seconds, with over 2 seconds of delay caused by render-blocking resources and oversized images. To improve performance, add explicit dimensions to all images (especially the banner slider images), optimize image file sizes and formats (could save 842 KiB), and reduce unused JavaScript and CSS which are currently wasting 44 KiB of bandwidth.
Other Optimization Recommendations
Fix Layout Shifts from Images
High Impact+12 points estimatedWhy It Matters:
Unsized images are causing 15 layout shifts with a CLS score of 0.217, severely impacting user experience.
How to Fix:
Add explicit width and height attributes to all images, especially the banner slider images. Set CSS aspect-ratio properties to maintain dimensions during loading. Reserve space for the carousel with min-height CSS properties to prevent content jumping.
Remove Unused JavaScript and CSS
Medium Impact+8 points estimatedWhy It Matters:
44% of JavaScript (32KB) and 67% of CSS (12KB) are unused, slowing down page load by 450ms.
How to Fix:
Audit the merged JavaScript and CSS files to identify unused code. Split bundles to load only critical resources initially. Use tree-shaking to remove unused polyfills and legacy JavaScript features for modern browsers.
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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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