Fix Forced Reflow Issues

How to optimize craft.kit.dev

Generic SiteScore: 97/100Analyzed January 2026

Fix Forced Reflow Issues

Medium Impact+1 point estimated

Why It Matters

JavaScript is causing 92ms of forced reflows that block the main thread and hurt INP.

How to Fix

Batch DOM reads and writes to avoid layout thrashing in app-B75yEAbr.js. Use requestAnimationFrame for DOM measurements. Cache geometric property values instead of repeatedly querying offsetWidth/offsetHeight.

0Good

What This Score Means

A score of 97 falls in the "Good" 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

2.4s
Good

Good: < 2.5s

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

INP

Interaction to Next Paint

37ms
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 website achieves an excellent performance score of 97/100, indicating very fast loading times for users. However, the biggest opportunity for improvement is reducing unused JavaScript code, which could save an estimated 69KB and improve loading times by up to 300ms - this includes removing unnecessary code from both the main app bundle and analytics tracking scripts. The site also has a render-blocking CSS file that delays initial page rendering by about 150ms, and some JavaScript functions are causing forced reflows that impact smoothness. While these issues are relatively minor given the high overall score, addressing the unused JavaScript would provide the most meaningful performance boost for users.

Other Optimization Recommendations

Remove Unused JavaScript Code

High Impact+2 points estimated

Why It Matters:

70KB of unused JavaScript is delaying LCP by 300ms and wasting bandwidth.

How to Fix:

Analyze Matomo tracking script and remove unused features (56% unused). Use tree-shaking in your build process to eliminate dead code from app-B75yEAbr.js (62% unused). Consider loading analytics scripts asynchronously after page load.

Eliminate Render-Blocking CSS

High Impact+1 point estimated

Why It Matters:

CSS file is blocking initial render and delaying LCP/FCP by 150ms.

How to Fix:

Inline critical CSS directly in the HTML head for above-the-fold content. Load non-critical CSS asynchronously using media='print' onload="this.media='all'" technique. Consider splitting CSS into critical and non-critical bundles in your build process.

Want to Analyze YOUR Website?

Get AI-powered performance insights with actionable fixes in 30 seconds

More Generic Speed Tests

Generic Performance Resources

Frequently Asked Questions

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.

Explore DeployHQ →Trusted by engineering teams shipping high-performance sites