LCP
Largest Contentful Paint
4.6s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Fix JavaScript Forced Reflows
How to optimize ajfoods.fr
Fix JavaScript Forced Reflows
Medium Impact+8 points estimated
Why It Matters
Forced reflows waste 774ms of main thread time, blocking user interactions and increasing TBT.
How to Fix
Optimize header.js and theme.js to batch DOM reads and writes. Cache geometric properties like offsetWidth instead of repeatedly querying them. Use requestAnimationFrame for layout-triggering operations in your Shopify theme scripts.
0Needs Improvement
What This Score Means
A score of 55 falls in the "Needs Improvement" 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
319ms
Needs Improvement
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.01
Good
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This Shopify site has poor performance with a score of 55/100, indicating significant user experience issues. The biggest problem is excessive unused CSS and JavaScript code - nearly 80% of the main stylesheet (19KB) and 88% of vendor scripts (76KB total) are unnecessary, which is severely slowing down page loading and causing a sluggish 4.6-second Largest Contentful Paint. The site is also suffering from forced reflows that are blocking user interactions for 850ms, making the page feel unresponsive. Cleaning up unused code, optimizing JavaScript execution, and fixing layout thrashing could easily improve the performance score by 30+ points and dramatically enhance the shopping experience.
Other Optimization Recommendations
Remove Unused JavaScript Code
High Impact+18 points estimatedWhy It Matters:
76 KiB of unused JavaScript delays LCP by 200ms and blocks user interactions.
How to Fix:
In your Shopify theme, audit vendor.js and remove unused libraries through theme customization. Split the 64KB WPM script to load only required modules. Use Shopify's Script Tag API to conditionally load scripts based on page type.
Eliminate Unused CSS Rules
High Impact+12 points estimatedWhy It Matters:
19 KiB of unused CSS delays both FCP and LCP by 150ms each.
How to Fix:
Use Shopify's theme inspector to identify unused CSS in theme.css. Remove styles for unused sections and components through the theme editor. Consider splitting CSS by page template to load only necessary styles per page type.
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Related Performance Analyses
More Shopify Speed Tests
Shopify Performance Resources
Eliminate Render Blocking Resources
Render-blocking CSS is delaying First Contentful Paint by 150ms and slowing initial page rendering.
Reduce JavaScript Bundle Size
203 KiB of unused JavaScript is bloating your site and 357ms of Total Blocking Time is delaying interactivity.
Optimize Image Delivery and Compression
Poor image optimization is causing a 450ms LCP delay and wasting 127 KiB of bandwidth.
Remove Render-Blocking Resources
Render-blocking CSS and JavaScript are delaying First Contentful Paint by 610ms.