LCP
Largest Contentful Paint
6.4s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize JavaScript Execution Performance
How to optimize staging.learn.wowlearnings.org
Optimize JavaScript Execution Performance
High Impact+15 points estimated
Why It Matters
3 seconds of JavaScript execution time is blocking the main thread and causing poor interactivity.
How to Fix
Break up long-running tasks in your React components using React.useMemo and React.useCallback for expensive computations. Move heavy JavaScript operations to Web Workers. Use React.lazy for route-based code splitting in Next.js pages.
0Needs Improvement
What This Score Means
A score of 54 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
221ms
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 54/100, indicating significant issues that are hurting user experience. The biggest problem is render-blocking CSS files that are delaying page content from appearing, with potential savings of over 1 second on key metrics like Largest Contentful Paint (currently taking 6.4 seconds). The site is also suffering from excessive JavaScript execution time (3 seconds) and nearly 300KB of unused JavaScript code that could be removed or deferred. Addressing the render-blocking resources by deferring non-critical CSS and reducing the JavaScript payload would provide the most immediate performance improvements for users.
Other Optimization Recommendations
Eliminate Render Blocking CSS
High Impact+25 points estimatedWhy It Matters:
CSS files are blocking page render for 1,070ms and delaying LCP by 1.05 seconds.
How to Fix:
In your Next.js app, move critical CSS inline using next/head for above-the-fold styles. Use dynamic imports for non-critical CSS components. Consider splitting the large 32KB CSS chunk using CSS modules or styled-components for component-level loading.
Remove Unused JavaScript Code
High Impact+18 points estimatedWhy It Matters:
285KB of unused JavaScript is slowing page load and wasting 910ms of processing time.
How to Fix:
Use Next.js dynamic imports to code-split large components. Remove Google Tag Manager or load it asynchronously using next/script with strategy='afterInteractive'. Audit your bundle with @next/bundle-analyzer to identify and eliminate unused dependencies.
Keep Your Site Fast After Optimization
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Related Performance Analyses
More Next.js Speed Tests
Next.js Performance Resources
Optimize Image Delivery and Sizing
Course thumbnail images are 2x larger than needed, wasting 31 KiB and potentially affecting LCP timing.
Eliminate Unused JavaScript Code
285 KiB of unused JavaScript is blocking the main thread and increasing Total Blocking Time by 950ms.
Remove Render-Blocking CSS Resources
CSS files are delaying LCP by 500ms and preventing the page from rendering critical content immediately.
Update JavaScript Build Target
Legacy JavaScript polyfills add 40 KiB of unnecessary code that modern browsers don't need.