LCP
Largest Contentful Paint
2.7s
Needs Improvement
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Update JavaScript Build Target
How to optimize dev.mallow.fi
Update JavaScript Build Target
Medium Impact+1 points estimated
Why It Matters
Legacy JavaScript polyfills add unnecessary 13KB and delay LCP by 150ms for modern browsers.
How to Fix
Update your Next.js config target to 'es2017' or higher in next.config.js to remove polyfills for Array.at, Object.fromEntries, and other modern features. Use browserslist to specify modern browser support and reduce bundle size by excluding outdated browser polyfills.
0Good
What This Score Means
A score of 93 falls in the "Good" 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
91ms
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 Next.js site performs well overall with a score of 93/100, but has some optimization opportunities that could enhance user experience. The biggest issue is resource load delay causing your Largest Contentful Paint to reach 2.7 seconds, primarily due to a render-blocking CSS file that's delaying initial page rendering by 120ms. You can improve performance by deferring or inlining critical CSS, removing 26KB of unused JavaScript code, and updating your build process to avoid unnecessary legacy JavaScript polyfills that are adding 13KB of extra code for modern browsers. These optimizations could reduce load times and bring your Core Web Vitals metrics into the "good" range.
Other Optimization Recommendations
Remove Unused JavaScript Code
High Impact+3 points estimatedWhy It Matters:
26 KiB of unused JavaScript is delaying LCP by 150ms and blocking page interactivity.
How to Fix:
Analyze your Next.js bundle using @next/bundle-analyzer to identify unused code in 51e743d7cf800b16.js. Use dynamic imports for components not needed on initial load. Enable tree shaking by ensuring your imports are specific rather than importing entire libraries.
Eliminate Render Blocking CSS
High Impact+2 points estimatedWhy It Matters:
CSS file is blocking initial page render and delaying First Contentful Paint by 100ms.
How to Fix:
Inline critical CSS directly in your Next.js page head using styled-jsx or extract critical styles with a tool like critical. Move non-critical CSS (8.5KB from b7d48e44ec6ca2b5.css) to load asynchronously using next/head with media='print' then switching to 'all' onload.
Keep Your Site Fast After Optimization
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Related Performance Analyses
More Next.js Speed Tests
Next.js Performance Resources
Eliminate Render Blocking CSS
CSS file is blocking initial page render and delaying First Contentful Paint by 100ms.
Remove Unused JavaScript Code
26 KiB of unused JavaScript is delaying LCP by 150ms and blocking page interactivity.
Reduce JavaScript Execution Time
1.3 seconds of JavaScript execution time is blocking the main thread and preventing user interactions.
Optimize Image Delivery and Sizing
Images are oversized for their display dimensions, wasting 545 KiB and slowing page load.