LCP
Largest Contentful Paint
5.7s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize JavaScript Bundle Size
How to optimize blackboxhosting.co.uk
Optimize JavaScript Bundle Size
High Impact+20 points estimated
Why It Matters
Heavy JavaScript execution time of 2.9 seconds blocks main thread and prevents user interactions.
How to Fix
Remove or replace the heavy reCAPTCHA implementation consuming 371KB. Audit WordPress plugins for unused JavaScript and remove unnecessary ones. Use WP Asset CleanUp to selectively disable JS on pages that don't need it. Defer non-critical scripts using async or defer attributes.
0Poor
What This Score Means
A score of 32 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
INP
Interaction to Next Paint
239ms
Needs Improvement
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.25
Needs Improvement
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This WordPress site has severe performance issues with a score of 32/100. The biggest problem is excessive JavaScript execution, particularly from reCAPTCHA and other plugins, which is blocking the main thread for over 5 seconds and causing an extremely slow Time to Interactive of 18.9 seconds. The site also suffers from render-blocking CSS files that delay content painting by nearly 3 seconds, and multiple page redirects add another 780ms of unnecessary delay. Reducing JavaScript payloads, implementing proper caching (currently missing), and fixing the redirect chain could potentially improve the score by 30+ points and dramatically enhance user experience.
Other Optimization Recommendations
Eliminate Render Blocking CSS
High Impact+25 points estimatedWhy It Matters:
CSS files are blocking initial page render and delaying LCP by 2.8 seconds.
How to Fix:
Inline critical CSS for above-the-fold content using plugins like Autoptimize or WP Rocket. Defer non-critical CSS including js_composer.min.css and mediaelementplayer-legacy.min.css. Use media='print' onload trick to load stylesheets asynchronously.
Fix Layout Shift Issues
Medium Impact+8 points estimatedWhy It Matters:
Multiple layout shifts (CLS 0.247) create jarring user experience and hurt Core Web Vitals.
How to Fix:
Add explicit width and height attributes to all images, especially the logo and client logos. Reserve space for the cookie banner with CSS to prevent layout shifts. Use font-display: swap on custom fonts and consider font metric overrides to reduce web font layout shifts.
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WordPress Performance Resources
Optimize Logo Image Dimensions
The header logo is 21KB larger than needed, serving a 768x363 image when only displaying 245x116 pixels.
Remove Unused Divi CSS
Your page loads 53KB of unused CSS (85% waste), slowing down initial render and consuming unnecessary bandwidth.
Fix Element Render Delays
LCP element experiences massive 5.6 second render delay, indicating blocking resources or layout thrashing issues.
Defer Render-Blocking CSS Resources
Large CSS files block initial page rendering, causing 580ms delay to both FCP and LCP metrics.