Remove Unused Bootstrap CSS Rules

How to optimize syncfusion.com

Generic SiteScore: 90/100Analyzed April 2026Re-analyze this site

Remove Unused Bootstrap CSS Rules

Medium Impact+2 points estimated

Why It Matters

94.5% of your Bootstrap CSS (18KB) is unused, wasting bandwidth and slowing page parsing.

How to Fix

Use PurgeCSS or UnCSS to remove unused styles from bootstrap3.7.1.min.css. Create a custom build containing only the Bootstrap components you actually use. Consider replacing with a lighter CSS framework or custom styles.

0Good

What This Score Means

A score of 90 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

3.2s
Needs Improvement

Good: < 2.5s

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

INP

Interaction to Next Paint

58ms
Good

Good: < 200ms

Measures how quickly the page responds to user interactions

CLS

Cumulative Layout Shift

0.05
Good

Good: < 0.1

Measures visual stability - how much content shifts during page load

AI Performance Analysis

This website achieves a good performance score of 90/100, but there are still some notable issues slowing down the user experience. The biggest problem is render-blocking JavaScript from a cookie consent script that's delaying when users first see content, adding about 160ms to both First Contentful Paint (2.0s) and Largest Contentful Paint (3.2s). Additionally, the site is wasting 18KB of bandwidth on unused CSS styles (94% of one stylesheet goes unused) and experiencing forced reflows that cause unnecessary layout calculations. Deferring the cookie script, removing unused CSS, and optimizing the JavaScript execution could easily push this site into the excellent performance range.

Other Optimization Recommendations

Eliminate Render-Blocking Cookie Script

High Impact+3 points estimated

Why It Matters:

The CookieYes script is blocking initial render and delaying both LCP and FCP by 150ms.

How to Fix:

Add the 'defer' attribute to the CookieYes script tag or move it to load after the initial content. Alternatively, inline critical cookie functionality and load the full script asynchronously using JavaScript's dynamic import.

Optimize Forced Reflow Performance

Medium Impact+2 points estimated

Why It Matters:

JavaScript is causing 134ms of forced reflows, blocking the main thread and delaying interactivity.

How to Fix:

Batch DOM reads and writes in your jQuery and CookieYes scripts. Cache geometric property values instead of repeatedly querying offsetWidth. Use CSS transforms instead of changing layout properties where possible.

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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