LCP
Largest Contentful Paint
5.3s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Convert GIF to Video Format
How to optimize zshn25.github.io
Convert GIF to Video Format
Medium Impact+8 points estimated
Why It Matters
The vision_transformer.gif is 136KB and could be reduced by 67KB using modern video formats.
How to Fix
Convert the animated GIF to MP4 and WebM formats using tools like FFmpeg. Replace the img tag with a video element using autoplay, loop, muted, and playsinline attributes. Provide fallback GIF for older browsers using poster attribute.
0Needs Improvement
What This Score Means
A score of 70 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
16ms
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 website has moderate performance issues with a score of 70/100, but users are experiencing frustratingly slow load times. The biggest problem is render-blocking CSS and JavaScript files that are delaying content from appearing, causing the first meaningful content to take 3.6 seconds and the largest element to load in 5.3 seconds. By deferring non-critical CSS/JavaScript and optimizing the blocking resources, you could save nearly a full second of load time. Additionally, implementing proper browser caching (currently only 10 minutes) and converting that large GIF to a modern video format could dramatically improve repeat visitor experience and save over 160KB in download size.
Other Optimization Recommendations
Eliminate Render Blocking Resources
High Impact+15 points estimatedWhy It Matters:
CSS and JavaScript files are blocking initial page render and delaying First Contentful Paint by 900ms.
How to Fix:
Defer the consent-gate.js file by adding 'defer' attribute or moving it to load after page content. Inline critical CSS from style.css above the fold and load the rest asynchronously. Use media='print' onload='this.media="all"' technique for non-critical CSS.
Optimize Font Loading Strategy
High Impact+12 points estimatedWhy It Matters:
Font files create a 616ms dependency chain and contribute significantly to your 5.3s LCP score.
How to Fix:
Add font-display: swap to your CSS font declarations to prevent invisible text during font load. Preload the most critical InterVariable.woff2 font using <link rel='preload' as='font' type='font/woff2'>. Consider using a font loading library like fontfaceobserver for better control.
Keep Your Site Fast After Optimization
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Related Performance Analyses
More Generic Speed Tests
Generic Performance Resources
Optimize Font Loading Strategy
Font files create a 616ms dependency chain and contribute significantly to your 5.3s LCP score.
Eliminate Render Blocking Resources
CSS and JavaScript files are blocking initial page render and delaying First Contentful Paint by 900ms.
Optimize Image Delivery Performance
Oversized and unoptimized images waste 116KB and delay LCP by 150ms with poor user experience.
Reduce JavaScript Bundle Size
Unused JavaScript accounts for 358KB of waste, delaying LCP by 900ms and blocking main thread execution.