LCP
Largest Contentful Paint
9.9s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize Images for Modern Formats
How to optimize vivo.com.br
Generic SiteScore: 21/100Analyzed January 2026
Optimize Images for Modern Formats
High Impact+18 points estimated
Why It Matters
Large PNG images consume 6.2MB and delay LCP, with product images being 3x larger than necessary.
How to Fix
Convert product images to WebP format for 40% size reduction. Implement responsive images with srcset to serve appropriate sizes (385x385 instead of 1200x1200). Add explicit width/height attributes to prevent layout shifts.
0Poor
What This Score Means
A score of 21 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
602ms
Poor
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.17
Needs Improvement
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This site has critical performance issues with an extremely poor score of 21/100. The biggest problem is massive unused CSS (316 KiB) and JavaScript (786 KiB) that's blocking the initial page render, causing a devastating 9.9-second load time for the main content. The site is also loading enormous unoptimized images (over 6 MB worth) that could be reduced by using modern formats like WebP and proper sizing. Cleaning up the unused code, optimizing images, and implementing proper caching could dramatically improve this score by 50+ points and provide users with a usable experience instead of the current 35+ second wait times.
Other Optimization Recommendations
Remove Unused CSS and JavaScript
High Impact+25 points estimatedWhy It Matters:
Unused code blocks rendering for 2.1 seconds and wastes 1.1MB of bandwidth, severely delaying LCP.
How to Fix:
Remove 97% unused CSS from clientlib-base.css (311KB savings). Code-split JavaScript bundles to load only required functionality. Implement tree-shaking to eliminate dead code from third-party libraries like Facebook Pixel and TikTok tracking.
Eliminate Render-Blocking Resources
High Impact+20 points estimatedWhy It Matters:
Critical CSS and JavaScript block initial page render for 2.7 seconds, preventing users from seeing content.
How to Fix:
Inline critical CSS for above-the-fold content. Move non-essential JavaScript like analytics and tracking scripts to load asynchronously. Defer elastic-apm-rum.js and other monitoring tools until after page interactive.
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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
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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