Fix Layout Thrashing Issues

How to optimize learn.wowlearnings.org

Next.js SiteScore: 45/100Analyzed May 2026Re-analyze this site

Fix Layout Thrashing Issues

Medium Impact+12 points estimated

Why It Matters

Forced reflows are causing 485ms of main thread blocking, contributing to poor INP scores.

How to Fix

Review the JavaScript file causing reflows (0cnk-vj-0hm9p.js) and batch DOM reads/writes. Use CSS transforms instead of changing layout properties. Implement ResizeObserver for responsive changes rather than reading offsetWidth repeatedly during render cycles.

0Poor

What This Score Means

A score of 45 falls in the "Poor" 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

LCP

Largest Contentful Paint

5.8s
Poor

Good: < 2.5s

Measures how long it takes for the main content to appear on screen

INP

Interaction to Next Paint

437ms
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 45/100, indicating significant user experience issues. The biggest problem is excessive unused JavaScript (282 KiB of waste) that's blocking page rendering and delaying your Largest Contentful Paint to a slow 5.8 seconds - well above the recommended 2.5 seconds. The site is also suffering from render-blocking CSS files and inefficient JavaScript execution that keeps the main thread busy for 6.4 seconds. Removing unused JavaScript, especially from Google Tag Manager and Next.js chunks, along with optimizing CSS delivery could potentially improve your score by 30+ points and dramatically reduce load times for users.

Other Optimization Recommendations

Eliminate Render Blocking CSS

High Impact+18 points estimated

Why It Matters:

Critical CSS blocks initial page render, delaying both FCP and LCP by 600ms.

How to Fix:

In your Next.js app, inline critical CSS for above-the-fold content using Critical CSS extraction. Move non-critical CSS like the 29KB unused stylesheet to load after first paint. Use next/dynamic for components with heavy styling to defer CSS loading until needed.

Remove Unused JavaScript Code

High Impact+15 points estimated

Why It Matters:

282KB of unused JavaScript delays LCP by 900ms and increases Total Blocking Time significantly.

How to Fix:

Use Next.js tree shaking to eliminate dead code from your bundles. Replace Google Analytics with lighter alternatives like Plausible, or defer GTM loading until after page interaction. Split large chunks using dynamic imports and load components on-demand to reduce initial bundle size.

Keep Your Site Fast After Optimization

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