LCP
Largest Contentful Paint
3.3s
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 chcierekci.co
Eliminate Render Blocking CSS
High Impact+4 points estimated
Why It Matters
Critical CSS files are blocking page render for 500ms, directly delaying both LCP and FCP.
How to Fix
Inline critical CSS from PublicLayout.CK0I8E67.css directly in the HTML head. Use media queries or async loading for non-critical CSS like ProductCard and AddToCart styles. Consider code-splitting CSS by route importance.
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
16ms
Good
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.01
Good
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This website achieves a good performance score of 92/100, but there's still room for improvement in loading speed. The biggest issue is render-blocking CSS files that are delaying the initial page display by about 500 milliseconds, particularly affecting how quickly users see content. Additionally, the site has oversized images that are wasting 79 KB of bandwidth and images without proper dimensions that could cause layout shifts. Optimizing these CSS files to load non-critically and properly sizing images could push the performance score even higher and create a smoother user experience.
Other Optimization Recommendations
Optimize Product Image Sizing
Medium Impact+2 points estimatedWhy It Matters:
Images are oversized by 79KB, wasting bandwidth and potentially slowing LCP on mobile connections.
How to Fix:
Implement responsive images using srcset attribute with multiple sizes (325w, 500w, 782w). Generate properly sized variants during build process. Compress existing WebP images further using tools like Squoosh or ImageOptim.
Add Image Dimensions for CLS
Low Impact+1 point estimatedWhy It Matters:
Missing width/height attributes on logo image can cause layout shifts during page load.
How to Fix:
Add explicit width='111' height='40' attributes to the logo image element. Use CSS aspect-ratio property as fallback for older browsers. Ensure all images have proper dimensions before lazy loading.
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Related Performance Analyses
More Generic Speed Tests
Generic Performance Resources
Extend Cache Lifetimes
Short cache durations force unnecessary re-downloads on repeat visits, slowing performance.
Eliminate Unused JavaScript Code
67KB of unused JavaScript increases bundle size and slows initial page load.
Implement Responsive Image Delivery
Oversized images delay LCP by 300ms and waste 70KB of bandwidth on mobile devices.
Inline Critical CSS and Defer Non-Critical
Render-blocking CSS is delaying initial paint by 160ms and preventing faster content rendering.