Performance
· 22 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.
968 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.05 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.091
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.02 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.
1.05 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.
BImage Optimization7 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
BJS Bundles7 scripts, 132 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202608310101/show_ads_impl_fy2021.js?bust=122880848 | 162 KB | 105 KB (65%) | ✓ | 3rd |
| https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-4278822566474202 | 56 KB | 27 KB (48%) | ✓ | 3rd |
| https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495 | 10 KB | — | ✓ | 3rd |
| https://www.it-servizioclienti.it/static/js/search.25754267c810.js | 1 KB | — | ✓ | 3rd |
| https://www.it-servizioclienti.it/static/main.bd76fea18883.js | 1 KB | — | ✓ | 3rd |
| https://ep2.adtrafficquality.google/sodar/sodar2.js | 8 KB | — | ✓ | 3rd |
| https://pagead2.googlesyndication.com/bg/0RC8bF15euHoMkh1IXZZfWRSzQN4ykSPR6g1iQcPav8.js | 22 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
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
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
A+Page Weight Budget538 KB transferred, 35 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+JS Execution Cost498ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202608310101/show_ads_impl_fy2021.js?bust=122880848 | 185ms | 153ms | 17ms | 3rd |
| https://www.it-servizioclienti.it/ | 177ms | 10ms | 1ms | 3rd |
| Unattributable | 85ms | 4ms | 0ms | 1st |
| https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-4278822566474202 | 52ms | 38ms | 6ms | 3rd |
A+Font Loading3 fonts (67 KB)PASS
Web fonts
3
67 KB total
Render-blocking
0
of 3
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+Resource HintsNo optimization neededPASS
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 Inventory35 resources · 538 KB · 132 KB savings availablePASS
~132.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 35 resources | 537.9 KiB | ||||||
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall35 requests over 2792msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 185ms | 162 KB | 65% | €2/mo | Optional |
www.it-servizioclienti.it www.it-servizioclienti.it | Other | 177ms | 8 KB | — | €2/mo | Optional |
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 52ms | 56 KB | 48% | €1/mo | Optional |
83% 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
65% of pagead2.googlesyndication.com'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 Optimization4 images, 105 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
4
Total Size
105 KB