LCP
Largest Contentful Paint
14.9s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Add Image Dimensions Attributes
How to optimize ats.org.vn
Angular SiteScore: 50/100Analyzed December 2025
Add Image Dimensions Attributes
Medium Impact+8 points estimated
Why It Matters
Missing width and height attributes on images cause layout shifts and degrade user experience.
How to Fix
Add explicit width and height attributes to all img elements in Angular templates. Use Angular's NgOptimizedImage directive for automatic optimization. Implement aspect-ratio CSS property as fallback for responsive images.
0Needs Improvement
What This Score Means
A score of 50 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
193ms
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 Angular website has poor performance with a score of 50/100, indicating significant user experience issues. The biggest problem is an extremely slow Largest Contentful Paint of 14.9 seconds, caused primarily by massive amounts of unused JavaScript and CSS code that's blocking the page from rendering quickly. The site is loading over 1.3MB of unnecessary JavaScript (including Google Tag Manager and Facebook tracking scripts) and 79KB of unused CSS that users don't need. Additionally, the site lacks proper caching for large video files (over 6MB) and has unoptimized images. By removing unused code, implementing proper caching, minifying remaining assets, and optimizing images, this site could potentially improve its performance score by 30+ points and reduce load times by over 10 seconds.
Other Optimization Recommendations
Remove Unused JavaScript Code
High Impact+25 points estimatedWhy It Matters:
1,375 KiB of unused JavaScript is blocking page load and delaying LCP by 4.7 seconds.
How to Fix:
Use Angular CLI's tree-shaking by building with --prod flag. Remove unused Google Tag Manager scripts and Facebook Pixel code. Implement code splitting with Angular lazy loading for non-critical modules using loadChildren syntax.
Eliminate Render Blocking Resources
High Impact+20 points estimatedWhy It Matters:
Critical CSS files are blocking initial render and delaying both FCP and LCP by 2.85 seconds.
How to Fix:
Inline critical CSS for above-the-fold content directly in the HTML head. Use Angular's preloadingStrategy with PreloadAllModules to prioritize essential styles. Defer non-critical CSS files using media='print' onload technique.
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