Reduce JavaScript Bundle Size

How to optimize forte.forte.com

Next.js SiteScore: 36/100Analyzed February 2026

Reduce JavaScript Bundle Size

High Impact+25 points estimated

Why It Matters

JavaScript execution takes 3.4 seconds and blocks main thread for 1,116ms, severely impacting LCP (10.8s) and TTI (11.0s).

How to Fix

Use Next.js bundle analyzer to identify unused code in _app.js (107KB wasted). Enable tree shaking and code splitting with dynamic imports. Remove legacy polyfills and update build target to modern browsers to save 25KB.

0Poor

What This Score Means

A score of 36 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

10.8s
Poor

Good: < 2.5s

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

INP

Interaction to Next Paint

778ms
Poor

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/React site has severe performance issues with a critically low score of 36/100. The biggest problem is excessive JavaScript execution taking 3.4 seconds, which is blocking user interactions and causing an extremely slow Time to Interactive of 11 seconds. The site is loading 105KB of unused JavaScript and oversized images that could be compressed by 861KB, while the Largest Contentful Paint is delayed to 10.8 seconds due to render blocking and poor resource optimization. Reducing JavaScript bundle sizes, optimizing images, and implementing proper caching could dramatically improve the score by 30+ points and provide a much better user experience.

Other Optimization Recommendations

Optimize LCP Image Loading

High Impact+20 points estimated

Why It Matters:

LCP image has 3.9 second render delay and wastes 350KB due to oversized dimensions and poor compression.

How to Fix:

Add fetchpriority='high' to the LCP image element. Implement Next.js Image component with proper responsive sizes. Compress images further and serve correctly sized variants (current 750px for 412px display).

Fix Forced Reflow Issues

Medium Impact+10 points estimated

Why It Matters:

JavaScript queries geometric properties after DOM changes, causing 113ms of forced reflows that block rendering.

How to Fix:

Batch DOM reads and writes to avoid layout thrashing in React components. Use useLayoutEffect sparingly and prefer useEffect. Consider CSS transforms over position changes for animations.

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Keep Your Site Fast After Optimization

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