LCP
Largest Contentful Paint
5.5s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize Legacy JavaScript Bundles
How to optimize itsys.gr
Generic SiteScore: 70/100Analyzed February 2026
Optimize Legacy JavaScript Bundles
High Impact+18 points estimated
Why It Matters
50 KiB of unnecessary polyfills and transpiled code slow down script execution and increase bundle sizes for modern browsers.
How to Fix
Update build configuration to target modern browsers (ES6+) and exclude unnecessary polyfills. Use differential serving to deliver modern ES6+ code to capable browsers. Remove Babel transforms for Array methods and Object methods supported in all modern browsers.
0Needs Improvement
What This Score Means
A score of 70 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
57ms
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 poor performance with a score of 70/100, primarily due to slow loading of the largest visual element which takes 5.5 seconds to appear. The biggest issues are third-party scripts from BestPrice.gr that are causing performance bottlenecks, aren't being cached properly (wasting 270 KB), and include unnecessary legacy JavaScript code for modern browsers. Additionally, the site has 77 KB of unused CSS and oversized images that could be compressed and properly sized. Fixing the caching issues, removing unused code, and optimizing images could improve the performance score by 15-20 points and significantly speed up page loading for users.
Other Optimization Recommendations
Implement Efficient Resource Caching
High Impact+25 points estimatedWhy It Matters:
Third-party scripts from bestprice.gr lack proper cache headers, causing 270 KiB of unnecessary downloads and delaying LCP by 1.3 seconds.
How to Fix:
Configure cache headers for external scripts using .htaccess or Cloudflare cache rules. Set Cache-Control headers with max-age=31536000 for static assets. Consider self-hosting critical third-party scripts to control caching policies.
Fix Forced Reflows Issues
Medium Impact+12 points estimatedWhy It Matters:
JavaScript queries to DOM geometry properties after style changes cause 78ms of forced reflows, blocking user interactions.
How to Fix:
Batch DOM reads before DOM writes in bestprice.gr scripts. Cache geometric properties like offsetWidth instead of repeatedly querying them. Consider requesting script optimization from the third-party provider or implement the functionality locally with better DOM handling.
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