LCP
Largest Contentful Paint
3.4s
Needs Improvement
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Reduce Unused JavaScript Payload
How to optimize sciencereader.com
Generic SiteScore: 70/100Analyzed February 2026
Reduce Unused JavaScript Payload
High Impact+15 points estimated
Why It Matters
127 KiB of unused JavaScript is bloating your page, with Google Analytics and Swiper.js being 97% unused.
How to Fix
Remove or conditionally load Swiper.js only on pages that use carousels. Optimize Google Analytics loading by using gtag with minimal configuration. Audit WordPress plugins and remove unused features. Use code splitting to load JavaScript only when needed.
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
715ms
Poor
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 mediocre performance with a score of 70/100, indicating significant room for improvement. The biggest problem is excessive unused JavaScript that's wasting 127 KB of data, combined with render-blocking resources that delay page rendering by 450ms and slow the site's interactivity to 7.3 seconds. The main culprits are Google Analytics tracking scripts, jQuery library, and Elementor plugin files that are loading unnecessarily or inefficiently. By removing unused JavaScript, deferring non-critical scripts, and optimizing the loading sequence of CSS and JavaScript files, this site could see substantial performance gains and much faster user experience.
Other Optimization Recommendations
Eliminate Render Blocking Resources
High Impact+18 points estimatedWhy It Matters:
Render blocking CSS and JavaScript are delaying First Contentful Paint by 450ms and blocking critical rendering path.
How to Fix:
Defer non-critical JavaScript like jQuery and Swiper.js using async or defer attributes. Inline critical CSS for above-the-fold content. Use media queries to load non-critical CSS files conditionally. Consider using WP Rocket or Perfmatters to automate render-blocking optimization.
Fix Resource Load Delays
High Impact+12 points estimatedWhy It Matters:
LCP element has a massive 2.49 second resource load delay, significantly impacting user experience.
How to Fix:
Add preload hints for the LCP image in your HTML head section. Optimize the critical request chain by reducing dependency depth from 3.4 seconds. Implement resource hints like dns-prefetch and preconnect for external domains. Consider using a CDN to reduce server response times.
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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
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