LCP
Largest Contentful Paint
8.5s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Fix LCP Image Loading
How to optimize dienthoaivui.com.vn
Fix LCP Image Loading
High Impact+20 points estimated
Why It Matters
LCP image has lazy loading applied and no fetchpriority, causing 8.5 second paint delay.
How to Fix
Remove loading='lazy' from the main product image (LCP element). Add fetchpriority='high' to the LCP image element. Use Nuxt's NuxtImg component with priority prop for above-the-fold images. Preload the LCP image in the document head.
0Poor
What This Score Means
A score of 32 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
238ms
Needs Improvement
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.03
Good
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This Nuxt/Vue website has severe performance issues with a critically low score of 32/100. The biggest problem is excessive unused JavaScript that's blocking the page from loading quickly - over 2.3MB of unnecessary code is being downloaded and executed, causing the main content to take 8.5 seconds to appear and making the page unresponsive for over 40 seconds. The site is also loading a massive 1MB Arial font file and has significant unused CSS from third-party services. Removing unused JavaScript, optimizing font loading, and cleaning up CSS could potentially improve the performance score by 40+ points and dramatically reduce load times from nearly 9 seconds to under 3 seconds.
Other Optimization Recommendations
Eliminate Unused JavaScript Code
High Impact+25 points estimatedWhy It Matters:
2.3MB of unused JavaScript is blocking rendering and delaying LCP by 2.1 seconds.
How to Fix:
Use Nuxt's tree-shaking capabilities by importing only needed components from libraries. Enable code splitting in nuxt.config.js with 'splitChunks.chunks: all'. Remove unused third-party scripts like excessive reCAPTCHA and Facebook pixel code. Defer non-critical JavaScript using Nuxt's lazy loading.
Eliminate Render Blocking CSS
High Impact+15 points estimatedWhy It Matters:
CSS files are blocking first paint for 1 second, delaying critical content visibility.
How to Fix:
Use Nuxt's built-in CSS optimization by enabling 'css.extract: true' in production. Inline critical CSS for above-the-fold content using @nuxtjs/critters module. Defer non-critical CSS like Swiper styles using media='print' onload trick. Remove unused CSS from third-party libraries.
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Related Performance Analyses
More Nuxt Speed Tests
Nuxt Performance Resources
Optimize Image Delivery and Sizing
Oversized placeholder images waste 17KB and lack proper dimensions causing layout shifts.
Remove Unused JavaScript Code
349 KiB of unused JavaScript is increasing bundle size and slowing script evaluation by 1.35 seconds.
Eliminate Render Blocking CSS
CSS files are blocking first paint for 1 second, delaying critical content visibility.
Eliminate Unused JavaScript Code
2.3MB of unused JavaScript is blocking rendering and delaying LCP by 2.1 seconds.