Performance
· 27 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.
4.03 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.74 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.92 s
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.
24.76 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.
21.30 s
Page Load Progression
FPage Weight BudgetAction4.4 MB transferred, 113 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction6528ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/zqB-6Xpbd3lCIvi7Tr2D0pob/recaptcha__it.js | 1212ms | 1033ms | 61ms | 3rd |
| https://www.servizi-web-marketing.it/ | 895ms | 15ms | 4ms | 3rd |
| Unattributable | 846ms | 32ms | 0ms | 1st |
| https://static.zdassets.com/web_widget/classic/latest/web-widget-main-c5d3cb1.js | 588ms | 434ms | 101ms | 3rd |
| https://static.zdassets.com/web_widget/classic/latest/web-widget-chat-sdk-c5d3cb1.js | 524ms | 460ms | 19ms | 3rd |
| https://www.servizi-web-marketing.it/media/com_widgetkit/lib/uikit/dist/js/uikit.min.js | 508ms | 197ms | 14ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1014840243&cx=c>m=4e69g1 | 437ms | 397ms | 38ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-N3MZ111WK2&cx=c>m=4e69g1 | 309ms | 260ms | 45ms | 3rd |
| https://scripts.clarity.ms/0.8.70/clarity.js | 278ms | 221ms | 11ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-W5WQHP4 | 248ms | 201ms | 42ms | 3rd |
Showing top 10 of 15 scripts
FJS BundlesAction37 scripts, 1.3 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/zqB-6Xpbd3lCIvi7Tr2D0pob/recaptcha__it.js | 0 KB | 172 KB (50%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/zqB-6Xpbd3lCIvi7Tr2D0pob/recaptcha__it.js | 0 KB | 172 KB (50%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/zqB-6Xpbd3lCIvi7Tr2D0pob/recaptcha__it.js | 347 KB | 172 KB (50%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/zqB-6Xpbd3lCIvi7Tr2D0pob/recaptcha__it.js | 347 KB | 172 KB (50%) | ✓ | 3rd |
| https://static.zdassets.com/web_widget/classic/latest/web-widget-5433-c5d3cb1.js | 139 KB | 126 KB (91%) | ✓ | 3rd |
| https://static.zdassets.com/web_widget/classic/latest/web-widget-main-c5d3cb1.js | 236 KB | 92 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-N3MZ111WK2&cx=c>m=4e69g1 | 189 KB | 76 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-W5WQHP4 | 159 KB | 68 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-24745138-1 | 124 KB | 63 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1014840243&cx=c>m=4e69g1 | 160 KB | 58 KB (36%) | ✓ | 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
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
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
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
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
FPage Weight InventoryAction113 resources · 4.4 MB · 1.3 MB savings availableFIX
~1.3 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 113 resources | 4.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction32 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CDocument CompressionActionDocument response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (134 KB)PASS
Web fonts
4
134 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
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)
Fixing the unchecked items could save ~9 KB and ~18 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
AAsset Compression1 of 2 asset hosts still on gzipPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
ACSS Performance Depth1 CSS depth issue(s) 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 Waterfall113 requests over 17018msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.gstatic.com www.gstatic.com | Other | 1212ms | 0 KB | 50% | €13/mo | Costly |
www.servizi-web-marketing.it www.servizi-web-marketing.it | Other | 895ms | 13 KB | — | €10/mo | Costly |
Zendesk Widget static.zdassets.com | Customer Support | 588ms | 236 KB | 39% | €6/mo | Costly |
Zendesk Widget static.zdassets.com | Customer Support | 524ms | 54 KB | 45% | €6/mo | Costly |
www.servizi-web-marketing.it www.servizi-web-marketing.it | Other | 508ms | 69 KB | 60% | €6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 437ms | 160 KB | 36% | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 309ms | 189 KB | 40% | €3/mo | Costly |
Microsoft Clarity scripts.clarity.ms | Session Replay | 278ms | 25 KB | — | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 248ms | 159 KB | 43% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 182ms | 124 KB | 51% | €2/mo | Optional |
Google Analytics www.google-analytics.com | Analytics | 175ms | 21 KB | — | €2/mo | Optional |
Zendesk Widget static.zdassets.com | Customer Support | 160ms | 6 KB | — | €2/mo | Optional |
Zendesk Widget static.zdassets.com | Customer Support | 84ms | 139 KB | 91% | €1/mo | Optional |
www.servizi-web-marketing.it www.servizi-web-marketing.it | Other | 82ms | 44 KB | 65% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.gstatic.com adds 1212ms and costs ~€13/month
- www.servizi-web-marketing.it adds 895ms and costs ~€10/month
- Zendesk Widget adds 588ms and costs ~€6/month
- Zendesk Widget adds 524ms and costs ~€6/month
- www.servizi-web-marketing.it adds 508ms and costs ~€6/month
- Google Tag Manager adds 437ms and costs ~€5/month
- Google Tag Manager adds 309ms and costs ~€3/month
- Microsoft Clarity adds 278ms and costs ~€3/month
- Google Tag Manager adds 248ms and costs ~€3/month
87% 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.gstatic.com takes 1212ms 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.servizi-web-marketing.it takes 895ms 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
Zendesk Widget takes 588ms 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
Zendesk Widget takes 524ms 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.servizi-web-marketing.it takes 508ms 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
60% of www.servizi-web-marketing.it's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 437ms 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 309ms 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
Microsoft Clarity takes 278ms 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 248ms 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
51% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
91% of Zendesk Widget's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
65% of www.servizi-web-marketing.it's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Image Optimization23 images, 1995 KB total, 224 KB wastedINFO
Image Optimization Audit
Total Images
23
Total Size
1995 KB
Oversized
4
Wasted
224 KB