LCP
Largest Contentful Paint
6.6s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize Image Sizing and Delivery
How to optimize mangabaka.org
Optimize Image Sizing and Delivery
High Impact+12 points estimated
Why It Matters
Oversized images waste 37KB and delay LCP by 600ms, significantly impacting your largest contentful paint score.
How to Fix
Configure your image proxy to serve appropriately sized images based on display dimensions - the cover image should be 241x349, not 483x700. Implement Vue's responsive image components or use srcset attributes. Add proper image optimization middleware to automatically resize images based on viewport.
0Needs Improvement
What This Score Means
A score of 60 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
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 Vue-powered manga site has poor performance with a score of 60/100, indicating significant user experience issues. The biggest problem is extremely slow loading times, with your Largest Contentful Paint taking 6.6 seconds and First Contentful Paint at 4.6 seconds - both well beyond acceptable limits. The main culprits are oversized images (particularly a manga cover that's twice as large as needed), 50KB of unused JavaScript code, and inefficient caching of analytics scripts. Optimizing image sizes, removing unused JavaScript, and implementing proper caching could easily improve your score by 25+ points and dramatically speed up page loading for your users.
Other Optimization Recommendations
Remove Unused JavaScript Code
High Impact+10 points estimatedWhy It Matters:
50KB of unused JavaScript delays both FCP and LCP by 150ms while blocking the main thread unnecessarily.
How to Fix:
Analyze the Datadog RUM bundle (28KB unused) and app chunks (22KB unused) to remove dead code. Use Vue's tree-shaking capabilities and dynamic imports for code splitting. Configure your build process to eliminate unused portions of third-party libraries like Datadog if monitoring isn't critical for this page.
Fix Forced Reflow Issues
Medium Impact+8 points estimatedWhy It Matters:
Forced reflows cause layout thrashing that blocks the main thread and degrades user interaction responsiveness.
How to Fix:
Review the Vue components causing reflows in your app chunks, particularly around DOM measurements. Batch DOM reads and writes in Vue lifecycle hooks. Use Vue's $nextTick() to defer DOM queries until after style changes are committed, preventing forced synchronous layout calculations.
Keep Your Site Fast After Optimization
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