LCP
Largest Contentful Paint
3.2s
Needs Improvement
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize Network Dependency Chain
How to optimize shutoffware.com
Optimize Network Dependency Chain
Medium Impact+4 points estimated
Why It Matters
Critical resources are chained with a 211ms dependency tree that delays page rendering.
How to Fix
Add preload hints for critical CSS and JavaScript files in your HTML head. Implement HTTP/2 push for essential assets or use modulepreload for JavaScript modules. Consider inlining small critical CSS to eliminate the network request entirely.
0Needs Improvement
What This Score Means
A score of 88 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
16ms
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 website has good overall performance with a score of 88/100, but has room for improvement in loading speed. The biggest issue is excessive unused JavaScript, particularly from Firebase and React libraries, which is wasting 145 KiB of data and slowing down the First Contentful Paint by 0.3 seconds. The site is also loading nearly all of its CSS unnecessarily (95% unused), adding another 14 KiB of wasted bandwidth. Removing or deferring this unused code could push the performance score into the excellent range and make the site feel noticeably faster for users.
Other Optimization Recommendations
Remove Unused JavaScript Code
High Impact+8 points estimatedWhy It Matters:
Unused JavaScript wastes 145 KiB and delays both FCP by 300ms and LCP by 150ms.
How to Fix:
Use webpack-bundle-analyzer to identify unused code in vendor bundles. Implement code splitting to load Firebase and React components only when needed. Use dynamic imports for non-critical features and tree-shake unused Firebase modules.
Defer Render-Blocking CSS
High Impact+6 points estimatedWhy It Matters:
The main CSS file blocks initial rendering and creates a 345ms delay in the critical path.
How to Fix:
Extract critical above-the-fold CSS and inline it in the HTML head. Load the remaining CSS asynchronously using media='print' onload technique. Use tools like Critical or Critters to automate critical CSS extraction for your build process.
Keep Your Site Fast After Optimization
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Related Performance Analyses
More Generic Speed Tests
Generic Performance Resources
Defer Render-Blocking CSS
The main CSS file blocks initial rendering and creates a 345ms delay in the critical path.
Optimize Firebase Loading Strategy
Firebase auth iframe creates a long dependency chain that extends page load by 1.4 seconds.
Eliminate Unused CSS Rules
95% of your CSS (14 KiB) is unused and delays both FCP and LCP by 150ms.
Eliminate Render Blocking Resources
CSS and font files are blocking initial render, delaying FCP by 900ms.