LCP
Largest Contentful Paint
0.8s
Good
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Monitor Third-Party Script Impact
How to optimize staging.nationalnumbers.co.uk
Generic SiteScore: 100/100Analyzed February 2026
Monitor Third-Party Script Impact
Low Impact+2 points estimated
Why It Matters
Cloudflare Zaraz and beacon scripts could potentially impact Core Web Vitals if they grow in size.
How to Fix
Regularly audit Cloudflare Zaraz configuration to remove unused tracking tools. Consider loading analytics scripts asynchronously or with defer attribute to prevent render blocking. Monitor script sizes and loading patterns to catch performance regressions early.
0Good
What This Score Means
A score of 100 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
INP
Interaction to Next Paint
16ms
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 100/100, indicating fast loading times and optimal user experience. However, there are still two minor optimization opportunities that could enhance repeat visitor performance: improving cache settings could save 8 KiB of data by extending cache lifetimes for JavaScript files, and optimizing the mobile viewport could eliminate potential 300ms tap delays on mobile devices. While these issues don't currently impact Core Web Vitals metrics, addressing the caching configuration would be the most beneficial next step for maintaining peak performance as the site grows.
Other Optimization Recommendations
Optimize Cache Headers Configuration
Medium Impact+3 points estimatedWhy It Matters:
Inefficient cache lifetimes waste 8 KiB on repeat visits and slow down returning users.
How to Fix:
Set cache headers for Cloudflare Zaraz script to at least 1 hour (3600 seconds) instead of no-cache. Configure your web server or CDN to cache static JavaScript resources with appropriate max-age headers. Add Cache-Control headers with longer lifetimes for third-party scripts that don't change frequently.
Fix Mobile Viewport Configuration
Medium Impact+5 points estimatedWhy It Matters:
Non-optimized viewport causes 300ms tap delays, significantly hurting mobile user interaction responsiveness.
How to Fix:
Add proper viewport meta tag to HTML head: <meta name='viewport' content='width=device-width, initial-scale=1'>. Remove any fixed viewport widths or disable user scaling that might trigger mobile browser delays. Test touch interactions to ensure immediate response on mobile devices.
Want to Analyze YOUR Website?
Get AI-powered performance insights with actionable fixes in 30 seconds
Related Performance Analyses
More Generic Speed Tests
Generic Performance Resources
Remove Unused JavaScript Code
Google Tag Manager scripts contain 139KB of unused code, slowing LCP by 600ms and wasting processing time.
Optimize Video File Caching
17MB of video content has zero cache lifetime, forcing full re-downloads on every visit and wasting 69MB of bandwidth.
Defer Render-Blocking JavaScript
JavaScript files are blocking initial page render, delaying FCP by 750ms and preventing users from seeing content.
Remove Unused CSS and JavaScript
136KB of unused JavaScript and 63KB of unused CSS waste bandwidth and slow down page parsing.
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