LCP
Largest Contentful Paint
3.7s
Needs Improvement
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Reduce JavaScript Execution Time
How to optimize vistaprint.in
Reduce JavaScript Execution Time
High Impact+25 points estimated
Why It Matters
JavaScript execution takes 19.9 seconds and blocks the main thread for 14 seconds, severely impacting user interaction.
How to Fix
Split large React bundles using code splitting with React.lazy() and Suspense. Defer non-critical third-party scripts like Quantum Metric and Facebook Pixel to load after page interactive. Remove duplicate NewRelic modules saving 68KB. Use tree shaking to eliminate unused code from the 829KB of unused JavaScript.
0Needs Improvement
What This Score Means
A score of 55 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
1942ms
Poor
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 Vistaprint website has poor performance with a score of 55/100, primarily due to excessive JavaScript processing that's blocking user interactions for over 14 seconds. The biggest issue is the massive amount of main-thread work (26.1 seconds total) caused by heavy script evaluation and parsing, making the page unresponsive until 35.6 seconds after loading. The site is also loading duplicate JavaScript modules (123 KiB of redundant code) and inefficient caching policies that waste 339 KiB on repeat visits. Reducing JavaScript payload, eliminating duplicate modules, and implementing better caching could dramatically improve the user experience and boost the performance score by 30+ points.
Other Optimization Recommendations
Implement Efficient Cache Headers
High Impact+15 points estimatedWhy It Matters:
Poor caching saves 339KB on repeat visits and improves LCP by 300ms for returning users.
How to Fix:
Set cache-control headers to 1 year for static assets like quantum-vistaprint.js and fbevents.js. Configure CDN to cache JavaScript bundles for at least 6 months. Use ETags for dynamic content and implement proper cache invalidation strategy when deploying new versions.
Optimize LCP Image Loading
Medium Impact+8 points estimatedWhy It Matters:
The LCP image lacks fetchpriority=high, potentially delaying the 3.7s LCP time further.
How to Fix:
Add fetchpriority='high' attribute to the banner image in the swan-banner-image-container. Preload the LCP image using <link rel='preload' as='image'> in the document head. Ensure the image is not lazy-loaded and is discoverable in the initial HTML without JavaScript execution.
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Related Performance Analyses
More Wix Speed Tests
Wix Performance Resources
Optimize LCP Image Loading
The LCP image lacks fetchpriority=high, potentially delaying the 3.7s LCP time further.
Implement Efficient Cache Headers
Poor caching saves 339KB on repeat visits and improves LCP by 300ms for returning users.
Remove Duplicate JavaScript Modules
63KB of duplicated JavaScript from Wix components increases bundle size and slows initial page load.
Fix Image Delivery Issues
Oversized gallery images waste 168KB and delay LCP by 850ms due to serving high-resolution assets for small display sizes.