LCP
Largest Contentful Paint
13.8s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Remove Unused JavaScript Code
How to optimize uncinc.nl
Remove Unused JavaScript Code
High Impact+18 points estimated
Why It Matters
578 KiB of unused JavaScript delays LCP by 3.25 seconds and blocks the main thread.
How to Fix
Use webpack-bundle-analyzer to identify unused code in your vendor bundle. Remove unused dependencies like immutable.js and emotion/core from your build process. Split your JavaScript into smaller chunks and load only required modules per page. Defer loading of Google Analytics and other tracking scripts until after page interactive.
0Needs Improvement
What This Score Means
A score of 53 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
312ms
Needs Improvement
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.05
Good
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This website has poor performance with a score of 53/100, indicating significant user experience issues. The biggest problem is an extremely slow Largest Contentful Paint of 13.8 seconds, primarily caused by excessive unused JavaScript (578 KiB) and inefficient image delivery (404 KiB savings possible). The site is also hurt by page redirects that waste 750ms and render-blocking Google Fonts requests. Cleaning up the JavaScript bundles, optimizing images with modern formats like WebP, and eliminating the redirect would likely improve the performance score by 30+ points and dramatically speed up page loading for users.
Other Optimization Recommendations
Eliminate Page Redirects Immediately
High Impact+12 points estimatedWhy It Matters:
Multiple redirects delay LCP by 750ms and waste critical rendering time.
How to Fix:
Update your web server configuration to directly serve https://www.uncinc.nl/nl instead of redirecting from https://www.uncinc.nl/. Configure your CDN or hosting provider to handle the redirect at the edge level. Test the direct URL to ensure it loads without any intermediate redirects.
Optimize Image Delivery Strategy
High Impact+8 points estimatedWhy It Matters:
Large, unoptimized images waste 404 KiB and slow down the LCP element rendering.
How to Fix:
Convert your images to WebP format using tools like ImageOptim or your CMS plugins. Implement responsive images with proper srcset attributes to serve appropriately sized images. Add explicit width and height attributes to prevent layout shifts. Use fetchpriority='high' on your LCP image element.
Keep Your Site Fast After Optimization
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Related Performance Analyses
More Generic Speed Tests
Generic Performance Resources
Implement Proper Font Loading
Web fonts cause layout shifts and block text rendering, delaying FCP by 610ms.
Optimize Critical Resource Loading
Render-blocking CSS delays FCP by 390ms and unused JavaScript wastes 97KB of bandwidth.
Fix Image Layout Shifts
Unsized images cause 0.417 CLS score, severely hurting user experience and Core Web Vitals.
Implement JavaScript Code Splitting
Loading all JavaScript upfront blocks rendering even for components not immediately visible to users.