LCP
Largest Contentful Paint
22.4s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Set Explicit Image Dimensions
How to optimize 533381.snk.wtf
Set Explicit Image Dimensions
Medium Impact+8 points estimated
Why It Matters
Missing width and height attributes on images cause layout shifts that hurt CLS and user experience.
How to Fix
Add explicit width and height attributes to the client screenshot image using Rails' image_tag helper with size or width/height options. Set CSS aspect-ratio property to maintain responsive behavior while preventing layout shifts. Update your Rails partials to include dimensions for all images.
0Needs Improvement
What This Score Means
A score of 75 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
39ms
Good
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 Ruby on Rails site has poor performance with a score of 75/100, but suffers from severe loading issues with a 22.4-second Time to Interactive. The biggest problem is massively oversized images that are wasting nearly 2.8MB of data - the logo image alone is 1.6MB when it only needs to display at 224x224 pixels but is served at 1024x1024. Converting these images to modern formats like WebP and properly sizing them for their display dimensions could save over 13 seconds on page load time. Adding explicit width and height attributes to images and applying fetchpriority="high" to the main logo would further improve the user experience and Core Web Vitals scores.
Other Optimization Recommendations
Optimize and Modernize Image Assets
High Impact+35 points estimatedWhy It Matters:
Images account for over 4MB of payload and delay LCP by 13.9 seconds, representing the largest performance bottleneck.
How to Fix:
Convert PNG images to WebP/AVIF format using Rails Active Storage variants or image_processing gem. Resize the logo from 1024x1024 to 224x224 served dimensions and the screenshot from 1535x1024 to 378x252. Add responsive image generation with Rails' image_variant helper to serve appropriately sized images.
Add Priority Hints to LCP Image
High Impact+15 points estimatedWhy It Matters:
The LCP image (logo) lacks fetchpriority=high, preventing the browser from prioritizing its download.
How to Fix:
Add fetchpriority='high' attribute to the logo image tag in your Rails view template. Use Rails' image_tag helper with loading: :eager and fetchpriority: :high options. Consider preloading the LCP image in the document head using link rel='preload'.
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Related Performance Analyses
More Ruby on Rails Speed Tests
Ruby on Rails Performance Resources
Add Priority Hints to LCP Image
The LCP image (logo) lacks fetchpriority=high, preventing the browser from prioritizing its download.
Optimize and Modernize Image Assets
Images account for over 4MB of payload and delay LCP by 13.9 seconds, representing the largest performance bottleneck.
Optimize Image Delivery Strategy
Images are oversized by 161 KiB and could improve perceived load performance.
Fix Forced Layout Reflows
JavaScript is causing 316ms of forced reflows that block the main thread and delay interactions.