LCP
Largest Contentful Paint
4.4s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Remove Legacy JavaScript Polyfills
How to optimize agileontheweb.com
Remove Legacy JavaScript Polyfills
Medium Impact+8 points estimated
Why It Matters
Unnecessary polyfills add 11KB of unused code and delay LCP by 150ms for modern browsers.
How to Fix
Update your Next.js browserslist configuration to target only modern browsers. Remove polyfills for Array.prototype.at, Array.flat, and Object.hasOwn since they're widely supported. Use Next.js's built-in modern JavaScript output by setting experimental.esmExternals to true in next.config.js.
0Needs Improvement
What This Score Means
A score of 58 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
73ms
Good
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
1.96
Poor
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This Next.js/React site has poor performance with a score of 58/100, primarily due to severe layout stability issues. The biggest problem is massive layout shifts (CLS score of 1.96) caused by an unsized video element in the hero section that shifts content around as the page loads. Additionally, render-blocking CSS files are delaying initial page rendering by 450ms, and there's 27KB of unused JavaScript that could be removed. Fixing the video element sizing and deferring non-critical CSS could dramatically improve both visual stability and loading speed, potentially boosting the performance score by 30+ points.
Other Optimization Recommendations
Fix Video Element Layout Shifts
High Impact+25 points estimatedWhy It Matters:
Unsized video elements are causing a severe CLS score of 1.955, significantly harming user experience.
How to Fix:
Add explicit width and height attributes to the hero video element. Use CSS aspect-ratio property to maintain responsive behavior. Consider using a placeholder image with identical dimensions while the video loads to prevent layout jumps.
Eliminate Render Blocking CSS
High Impact+18 points estimatedWhy It Matters:
Two CSS files are blocking initial render and delaying LCP by 450ms.
How to Fix:
Inline critical CSS for above-the-fold content in your Next.js layout component. Use next/dynamic with ssr: false for non-critical styles. Consider splitting CSS using Next.js built-in CSS code splitting to load only necessary styles per page.
Keep Your Site Fast After Optimization
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Related Performance Analyses
More Next.js Speed Tests
Next.js Performance Resources
Fix Video Element Layout Shifts
Unsized video elements are causing a severe CLS score of 1.955, significantly harming user experience.
Fix Forced Reflow Issues
JavaScript is causing 95ms of forced reflows, blocking the main thread and degrading INP.
Remove Unused JavaScript Code
76% of JavaScript in main chunk (27KB) is unused, creating unnecessary network overhead.
Eliminate Render Blocking CSS
Two CSS files are blocking initial render and delaying LCP by 450ms.