LCP
Largest Contentful Paint
5.6s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize JavaScript Bundle Splitting
How to optimize learn.wowlearnings.org
Optimize JavaScript Bundle Splitting
High Impact+18 points estimated
Why It Matters
Excessive JavaScript execution time of 2.0 seconds is blocking the main thread and delaying LCP by 900ms.
How to Fix
Use Next.js dynamic imports to code-split large chunks like 0ajqs2jt65kqb.js (950ms execution time). Implement React.lazy() for components not needed on initial render. Configure webpack bundle analyzer to identify and remove unused dependencies from your bundles.
0Needs Improvement
What This Score Means
A score of 67 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
186ms
Good
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.01
Good
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This Next.js/React site has concerning performance issues with a score of 67/100, indicating significant room for improvement. The biggest problem is excessive JavaScript execution taking 3.5 seconds of main thread work, which is causing your page to become interactive very slowly at 8.8 seconds and delaying your Largest Contentful Paint to 5.6 seconds. The site is loading 284 KB of unused JavaScript code and has render-blocking CSS files that could save 560ms if optimized. Reducing JavaScript bundle sizes, removing unused code, and deferring non-critical resources would dramatically improve your Core Web Vitals and user experience.
Other Optimization Recommendations
Eliminate Render-Blocking CSS Resources
High Impact+15 points estimatedWhy It Matters:
CSS files are blocking First Contentful Paint and LCP by 550ms, preventing users from seeing content quickly.
How to Fix:
Use Next.js built-in CSS optimization by moving critical styles inline with styled-jsx or CSS-in-JS. Defer non-critical CSS using next/dynamic with ssr: false for below-the-fold components. Split CSS chunks to load only necessary styles per route.
Remove Legacy JavaScript Polyfills
Medium Impact+8 points estimatedWhy It Matters:
Unnecessary polyfills are adding 40KB of unused code and delaying LCP by 250ms for modern browsers.
How to Fix:
Update your Next.js browserslist config to target modern browsers (>0.25%, not dead). Configure Babel to exclude polyfills for baseline JavaScript features like Array.prototype.at and Object.hasOwn. Use differential loading to serve modern JS to capable browsers.
Keep Your Site Fast After Optimization
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Related Performance Analyses
More Next.js Speed Tests
Next.js Performance Resources
Eliminate Element Render Delay
LCP element has 3.2 second render delay causing the poor 7-second LCP score.
Optimize JavaScript Bundle Size
Heavy JavaScript parsing takes 900ms and creates 990ms of blocking time, preventing user interactions.
Fix Render-Blocking Font Loading
Google Fonts are blocking first paint for 1.65 seconds, severely delaying LCP and FCP.
Optimize Image Delivery and Sizing
Images are oversized and poorly compressed, wasting 289 KiB of bandwidth with no impact on visual quality.