LCP
Largest Contentful Paint
9.5s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Fix Cookie Dialog Element Render
How to optimize koditt.nl
Fix Cookie Dialog Element Render
High Impact+20 points estimated
Why It Matters
Cookie dialog causes 5.2 second element render delay, making it the LCP element instead of actual content.
How to Fix
Move Cookiebot initialization to after page load using Next.js useEffect hook. Add CSS to prevent layout shift by reserving space. Consider server-side rendering the dialog or using a lighter cookie solution that doesn't block rendering.
0Poor
What This Score Means
A score of 35 falls in the "Poor" 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
443ms
Needs Improvement
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
This Next.js site has severe performance problems with a critically low score of 35/100. The biggest issue is an extremely slow Time to Interactive of 42 seconds, caused by excessive JavaScript execution (3.2 seconds) and 469 KiB of unused JavaScript code from Google Tag Manager and other scripts. The site is also suffering from forced reflows that are blocking the main thread for over 1 second, creating a terrible user experience with 8.3 seconds of Total Blocking Time. Removing unused JavaScript, optimizing the Google Analytics implementation, and fixing the forced reflow issues could dramatically improve performance and reduce load times by several seconds.
Other Optimization Recommendations
Reduce Unused JavaScript Bundle Size
High Impact+25 points estimatedWhy It Matters:
480KB of unused JavaScript delays LCP by 2.6 seconds and blocks main thread execution.
How to Fix:
Configure Next.js bundle analyzer to identify unused code. Enable tree-shaking in webpack config. Remove Google Tag Manager/Analytics if not essential or load asynchronously. Use dynamic imports for heavy components that aren't immediately visible.
Add Preconnect Headers for External Origins
Medium Impact+8 points estimatedWhy It Matters:
Missing preconnect hints to CMS and Cookiebot domains waste 300ms each on connection setup.
How to Fix:
Add preconnect links in Next.js Head component for cms.koditt.dev and consent.cookiebot.com. Use <link rel='preconnect' href='https://cms.koditt.dev' /> in your _document.js file. Limit to 4 total preconnect hints for optimal performance.
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Related Performance Analyses
More Next.js Speed Tests
Next.js Performance Resources
Eliminate Legacy JavaScript Polyfills
Unnecessary polyfills add 14KB and delay LCP by 150ms for modern browsers.
Optimize JavaScript Execution Performance
JavaScript execution blocks the main thread for 2.8 seconds, creating a 770ms potential input delay.
Remove Unused JavaScript Code
Unused JavaScript wastes 11MB of bandwidth and delays LCP by 55.8 seconds while blocking interactions.
Optimize JavaScript Bundle Splitting
Large JavaScript bundles are causing 1.6s execution time and 200ms blocking time, severely impacting interactivity.