LCP
Largest Contentful Paint
6.5s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Enable Browser Caching for Assets
How to optimize test.postie.pantheonsite.io
WordPress SiteScore: 73/100Analyzed January 2026
Enable Browser Caching for Assets
Medium Impact+6 points estimated
Why It Matters
358 KiB of video and image assets have no cache headers, forcing re-downloads on repeat visits.
How to Fix
Add cache headers to your .htaccess file or use WP Rocket caching plugin to set 1-year expiration for images and videos. Configure your hosting provider (Pantheon) to enable browser caching for static assets. Prioritize caching the 305 KiB WebM video which has the largest impact.
0Needs Improvement
What This Score Means
A score of 73 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
65ms
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 WordPress site has below-average performance with a score of 73/100, with the biggest problem being excessive unused JavaScript that's delaying your Largest Contentful Paint by 6.5 seconds. The site is loading 133 KiB of unnecessary JavaScript from Google Tag Manager, jQuery, and Swiper components that aren't being used, which could save over 500ms in load time if removed or deferred. Additionally, your custom fonts from Typekit are blocking text rendering, and static assets like videos and images have no browser caching configured, forcing users to re-download 358 KiB of content on every visit. Cleaning up unused code, optimizing font loading, and implementing proper caching could easily boost your performance score by 15-20 points and significantly improve user experience.
Other Optimization Recommendations
Remove Unused JavaScript Libraries
High Impact+12 points estimatedWhy It Matters:
133 KiB of unused JavaScript delays LCP by 500ms and blocks page interactivity.
How to Fix:
Audit WordPress plugins to identify unused features from Google Tag Manager, jQuery, and Swiper. Use Asset CleanUp Pro to conditionally load scripts only where needed. Replace jQuery dependencies with vanilla JavaScript where possible to eliminate the 24 KiB jQuery overhead.
Optimize Font Display Strategy
High Impact+8 points estimatedWhy It Matters:
Adobe Typekit fonts delay First Contentful Paint by 50ms causing text invisibility.
How to Fix:
Add font-display: swap to your Adobe Typekit configuration through their dashboard settings. Install a plugin like OMGF (Optimize My Google Fonts) to host fonts locally with swap display. Implement font metric overrides in your WordPress theme's CSS to prevent layout shifts during font loading.
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WordPress Performance Resources
Eliminate Render Blocking CSS
CSS files are blocking initial page render and delaying LCP by 200ms.
Reduce JavaScript Execution Time
JavaScript blocks the main thread for 4.1 seconds, causing 720ms Total Blocking Time and poor interactivity.
Optimize Font Loading Display
Font loading delays are blocking First Contentful Paint by 900ms and causing layout shifts.
Optimize Caching and Font Loading
Poor cache policies waste 112 KiB on repeat visits and custom fonts delay render by 2.5 seconds.
Frequently Asked Questions
Keep Your Site Fast After Optimization
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