Performance
· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
4.35 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
5.17 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
196 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.35 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
5.38 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CJS Execution CostAction1645ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.roccosiffredifilms.com/ | 526ms | 32ms | 46ms | 3rd |
| Unattributable | 336ms | 34ms | 0ms | 1st |
| https://www.roccosiffredifilms.com/_next/static/chunks/255-09eddc9d5ad190e7.js | 316ms | 294ms | 13ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-B6DW0JNSVQ | 243ms | 207ms | 34ms | 3rd |
| https://www.roccosiffredifilms.com/_next/static/chunks/4bd1b696-21f374d1156f834a.js | 224ms | 189ms | 13ms | 3rd |
BJS Bundles21 scripts, 68 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-B6DW0JNSVQ | 161 KB | 68 KB (42%) | ✓ | 3rd |
| https://www.roccosiffredifilms.com/_next/static/chunks/webpack-ca3c89e4067f54c6.js | 2 KB | — | ✓ | 3rd |
| https://www.roccosiffredifilms.com/_next/static/chunks/4bd1b696-21f374d1156f834a.js | 55 KB | — | ✓ | 3rd |
| https://www.roccosiffredifilms.com/_next/static/chunks/255-09eddc9d5ad190e7.js | 45 KB | — | ✓ | 3rd |
| https://www.roccosiffredifilms.com/_next/static/chunks/main-app-5b9be70a80a88730.js | 1 KB | — | ✓ | 3rd |
| https://www.roccosiffredifilms.com/_next/static/chunks/20-0082a47cf797de37.js | 19 KB | — | ✓ | 3rd |
| https://www.roccosiffredifilms.com/_next/static/chunks/app/global-error-6dddef79086a774b.js | 8 KB | — | ✓ | 3rd |
| https://www.roccosiffredifilms.com/_next/static/chunks/252-a3be2262a0215496.js | 7 KB | — | ✓ | 3rd |
| https://www.roccosiffredifilms.com/_next/static/chunks/577-2d6b70331a27521e.js | 7 KB | — | ✓ | 3rd |
| https://www.roccosiffredifilms.com/_next/static/chunks/app/%5Blocale%5D/layout-0ebd3b8c54a6035d.js | 4 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
BResource Hints6 hints, 0 missing preconnectsREVIEW
Current Resource Hints
6 resource hints configured
Fonts are always fetched as crossorigin=anonymous; a preload without the attribute creates a different cache key, so the browser refetches when the actual font request happens. Sample: /_next/static/media/e4af272ccee01ff0-s.p.woff2. Add `crossorigin` (or `crossorigin="anonymous"`) to each preload.
Performance issues directly impact user engagement and conversion rates.
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://transform.gammacdn.com. Remove the redundant dns-prefetch entries.
Performance issues directly impact user engagement and conversion rates.
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://transform.gammacdn.com (dns-prefetch+preconnect).
Performance issues directly impact user engagement and conversion rates.
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
A+Page Weight Budget665 KB transferred, 56 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization15 images, 0 KB saveablePASS
A+Font Loading1 fonts (48 KB)PASS
Web fonts
1
48 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
APage Weight Inventory56 resources · 665 KB · 68 KB savings availablePASS
~68.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 56 resources | 664.8 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall56 requests over 2052msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.roccosiffredifilms.com www.roccosiffredifilms.com | Other | 526ms | 30 KB | — | €8/mo | Costly |
www.roccosiffredifilms.com www.roccosiffredifilms.com | Other | 316ms | 45 KB | — | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 243ms | 161 KB | 42% | €4/mo | Costly |
www.roccosiffredifilms.com www.roccosiffredifilms.com | Other | 224ms | 55 KB | — | €4/mo | Costly |
These scripts may cost more than they're worth
- www.roccosiffredifilms.com adds 526ms and costs ~€8/month
- www.roccosiffredifilms.com adds 316ms and costs ~€5/month
- Google Tag Manager adds 243ms and costs ~€4/month
- www.roccosiffredifilms.com adds 224ms and costs ~€4/month
80% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
www.roccosiffredifilms.com takes 526ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.roccosiffredifilms.com takes 316ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 243ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.roccosiffredifilms.com takes 224ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Image Optimization53 images, 18 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
53
Total Size
18 KB