LCP
Largest Contentful Paint
1.9s
Good
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize Network Request Chain Dependencies
How to optimize vivo.com.br
Generic SiteScore: 99/100Analyzed January 2026
Optimize Network Request Chain Dependencies
Medium Impact+2 points estimated
Why It Matters
Critical resource chains create a 612ms delay as resources wait for dependencies to load sequentially.
How to Fix
Preload the cf.errors.css file using '<link rel="preload" href="https://vivo.com.br/cdn-cgi/styles/cf.errors.css" as="style">' in the HTML head. Consider bundling critical CSS directly into the main HTML document. Review if the Cloudflare error CSS is necessary for the primary user experience.
0Good
What This Score Means
A score of 99 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 has excellent performance with a score of 99/100, indicating a very fast and well-optimized site. The main issue is a render-blocking CSS file (cf.errors.css) that's preventing the page from displaying immediately, though it's only causing a minor 163ms delay. The site could benefit from extending cache lifetimes for static resources, which would save about 10KB on repeat visits and make the page even faster for returning users. Overall, this is a high-performing site with only minor optimization opportunities remaining.
Other Optimization Recommendations
Eliminate Render-Blocking CSS Resource
Medium Impact+3 points estimatedWhy It Matters:
The cf.errors.css file is blocking initial page render and delaying content visibility by 163ms.
How to Fix:
Inline the critical CSS from cf.errors.css directly in the HTML head section since it's only 4.9KB. Alternatively, add 'media="print" onload="this.media='all'"' to the stylesheet link to make it non-blocking. Remove or defer this Cloudflare error stylesheet if it's not essential for the main page content.
Extend Cache Lifetimes for Static Assets
Low Impact+1 point estimatedWhy It Matters:
Short cache durations force repeat downloads of 10KB worth of static resources, slowing return visits.
How to Fix:
Configure Cloudflare or server caching to extend cache headers for static assets to at least 1 year (31536000 seconds). Set cf.errors.css and cf-no-screenshot-error.png cache lifetime from 2 hours to 1 year since these rarely change. Update beacon.min.js cache from 1 day to longer duration through Cloudflare settings.
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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
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