LCP
Largest Contentful Paint
3.8s
Needs Improvement
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize JavaScript Execution Performance
How to optimize learn.wowlearnings.org
Optimize JavaScript Execution Performance
High Impact+12 points estimated
Why It Matters
JavaScript execution takes 2.3 seconds and causes 750ms of Total Blocking Time, preventing user interactions.
How to Fix
Split large JavaScript bundles using Next.js automatic code splitting. Move heavy computations to Web Workers. Update your build configuration to target modern browsers and remove unnecessary polyfills for Array.from, Object.hasOwn, and other baseline features.
0Needs Improvement
What This Score Means
A score of 64 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
397ms
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 Next.js site has poor performance with a score of 64/100, indicating significant user experience issues. The biggest problem is excessive unused JavaScript (285 KiB wasted), which is severely slowing down page loading and causing an 8.4-second Speed Index - meaning visitors wait over 8 seconds to see meaningful content. The site is also suffering from render-blocking CSS files and inefficient JavaScript execution that's monopolizing the main thread for over 4 seconds. Removing unused JavaScript code, optimizing the build process to eliminate unnecessary polyfills for modern browsers, and addressing the render-blocking resources could dramatically improve loading speeds and user satisfaction.
Other Optimization Recommendations
Eliminate Render Blocking Resources
High Impact+18 points estimatedWhy It Matters:
CSS files are blocking initial page render and delaying both LCP and FCP by 500ms.
How to Fix:
Move critical CSS inline in your Next.js _document.js file. Use next/dynamic with ssr: false for non-critical components. Implement CSS code splitting by moving unused styles to component-specific CSS modules.
Remove Unused JavaScript Code
High Impact+15 points estimatedWhy It Matters:
285 KiB of unused JavaScript is delaying LCP by 450ms and blocking the main thread.
How to Fix:
Use Next.js bundle analyzer to identify unused code. Implement dynamic imports for heavy components that aren't immediately visible. Remove or defer Google Analytics until after page load using next/script with strategy='afterInteractive'.
Keep Your Site Fast After Optimization
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Related Performance Analyses
More Next.js Speed Tests
Next.js Performance Resources
Update JavaScript Build Target
Legacy polyfills waste 11KB and slow LCP by 150ms for modern browsers.
Defer Render-Blocking CSS
The main CSS file blocks initial render, delaying both LCP and FCP by 100ms.
Remove Unused CSS Rules
91% of CSS is unused, blocking render and delaying LCP by 300ms.
Fix Element Render Delay Issue
The LCP element has a massive 2.5-second render delay, indicating JavaScript is blocking rendering of critical content.