Eliminate Unused JavaScript Code

How to optimize dev.happythoughts.in

Next.js SiteScore: 48/100Analyzed March 2026Re-analyze this site

Eliminate Unused JavaScript Code

High Impact+15 points estimated

Why It Matters

219 KiB of unused JavaScript is blocking page rendering and delaying LCP by 950ms.

How to Fix

Use Next.js bundle analyzer to identify unused code in your chunks. Remove unused Google Analytics features or defer GTM loading. Implement dynamic imports for large components that aren't immediately needed. Configure your build to exclude unused polyfills and dependencies.

0Poor

What This Score Means

A score of 48 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

15.2s
Poor

Good: < 2.5s

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

INP

Interaction to Next Paint

267ms
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 48/100, indicating significant user experience issues. The biggest problem is an extremely slow Largest Contentful Paint of 15.2 seconds, primarily caused by a massive 276KB logo image that's displayed at only 109x105 pixels but served at 2852x2696 resolution. The site is also loading 219KB of unused JavaScript code, including Google Analytics scripts and Next.js chunks that aren't being utilized, which blocks the main thread for 1.5 seconds and delays interactivity. Resizing and optimizing images, removing unused JavaScript, and implementing proper caching could dramatically improve the score by 30+ points and provide a much faster user experience.

Other Optimization Recommendations

Fix Resource Load Delay Issue

High Impact+35 points estimated

Why It Matters:

Your LCP is delayed by 10.5 seconds due to resource load delay, making the page appear frozen to users.

How to Fix:

Investigate and fix the resource loading bottleneck causing the 10.5-second delay in your Next.js app. Check for blocking requests, network issues, or server-side rendering problems. Consider implementing Next.js Image optimization with priority loading for your LCP image element.

Optimize Image Delivery Strategy

High Impact+12 points estimated

Why It Matters:

Images are 275KB larger than needed and directly impact your LCP performance by 950ms.

How to Fix:

Use Next.js Image component with proper sizing for your logo (currently 2852x2696 displayed as 109x105). Enable responsive images with appropriate srcSet configurations. Compress the logo PNG and convert to WebP format using next-optimized-images or similar optimization.

Keep Your Site Fast After Optimization

Once your site is optimized, maintain that speed. Use DeployHQ for zero-downtime, automated deployments—so performance fixes and updates go live safely every time, without breaking your site.

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