LCP
Largest Contentful Paint
6.3s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Eliminate Render Blocking CSS
How to optimize staging.learn.wowlearnings.org
Eliminate Render Blocking CSS
High Impact+18 points estimated
Why It Matters
CSS files are blocking initial page render and delaying LCP by 1 full second.
How to Fix
Configure Next.js to inline critical CSS using next-critical plugin. Move non-critical CSS to load asynchronously with media='print' onload="this.media='all'" technique. Split your CSS bundle to load only above-the-fold styles initially.
0Needs Improvement
What This Score Means
A score of 66 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
179ms
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 Next.js site has poor performance issues with a score of 66/100. The biggest problem is excessive JavaScript execution time (1.9 seconds) combined with render-blocking CSS files that are delaying your Largest Contentful Paint to 6.3 seconds - well above the recommended 2.5 seconds. The site is loading 285 KB of unused JavaScript and 29 KB of unused CSS, while also using outdated JavaScript polyfills that aren't needed for modern browsers. Reducing JavaScript bundle sizes, removing unused code, and deferring non-critical CSS could improve your score by 25+ points and dramatically speed up page loading.
Other Optimization Recommendations
Reduce Unused JavaScript Bundle
High Impact+15 points estimatedWhy It Matters:
285 KiB of unused JavaScript is unnecessarily delaying page load and blocking the main thread.
How to Fix:
Enable Next.js bundle analyzer to identify unused code in your chunks. Implement dynamic imports for non-critical components using next/dynamic. Configure webpack-bundle-analyzer to split vendor bundles and defer Google Analytics loading until after page interactive.
Update JavaScript Build Target
Medium Impact+8 points estimatedWhy It Matters:
Legacy JavaScript polyfills add 40 KiB of unnecessary code that modern browsers don't need.
How to Fix:
Update your Next.js target in next.config.js to 'es2017' or newer to avoid transpiling modern features. Configure Babel preset-env with browserslist targeting only browsers with >1% usage. Remove polyfills for Array.prototype.at, Object.fromEntries, and other baseline features.
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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.