LCP
Largest Contentful Paint
41.8s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize LCP Video Element
How to optimize kooksheaders.com
Optimize LCP Video Element
High Impact+18 points estimated
Why It Matters
Hero video has 2.1 second render delay and uses preload='none', severely impacting LCP performance.
How to Fix
Add fetchpriority='high' to the hero video element. Change preload='none' to preload='metadata' for faster initial frame display. Optimize video poster image (reduce from 1013x675 to displayed 489x275). Consider using intersection observer to load video only when visible.
0Needs Improvement
What This Score Means
A score of 52 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
136ms
Good
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.01
Good
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This Shopify site has poor performance with a score of 52/100, indicating significant user experience issues. The biggest problem is excessive unused JavaScript that's blocking the page from loading efficiently - particularly from chat widgets, Google tracking scripts, and third-party apps that are wasting nearly 1MB of data and delaying content visibility by over 3 seconds. The site also suffers from massive image files (over 1MB) that aren't optimized for web delivery and render-blocking resources that prevent the page from displaying content quickly. Removing unused JavaScript, optimizing images to modern formats like WebP, and deferring non-critical scripts could dramatically improve loading times and boost the performance score by 30+ points.
Other Optimization Recommendations
Eliminate Unused JavaScript Bundles
High Impact+25 points estimatedWhy It Matters:
941 KiB of unused JavaScript delays LCP by 3.25 seconds and blocks critical rendering.
How to Fix:
Remove or defer Shopify Chat widget (119KB unused), Google Analytics scripts (215KB unused), and unnecessary tracking code. Use Shopify's Script Tag API to load analytics after page interaction. Implement code splitting for critical vs non-critical JavaScript.
Fix Forced Reflow Issues
Medium Impact+8 points estimatedWhy It Matters:
67ms of forced reflows in slideshow vendor JavaScript blocks main thread and delays interactivity.
How to Fix:
Batch DOM reads and writes in slideshow-vendor.js by storing layout properties before DOM mutations. Replace synchronous offsetWidth/offsetHeight calls with cached values. Use requestAnimationFrame for layout-triggering operations in carousel animations.
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Related Performance Analyses
More Shopify Speed Tests
Shopify Performance Resources
Eliminate Render-Blocking CSS
Blocking CSS files delay First Contentful Paint by 410ms, slowing initial page render.
Reduce JavaScript Execution Time
JavaScript blocks the main thread for 5.3 seconds, preventing user interactions and delaying page responsiveness.
Fix Layout Shifts from Images
Unsized images cause major layout shifts (CLS 0.304) that hurt user experience and rankings.
Reduce JavaScript Execution Time
3.6 seconds of JavaScript execution creates 730ms of blocking time, preventing user interactions.