Performance
· 17 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.
5.93 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
14.67 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.21 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.084
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.07 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.
14.72 s
Page Load Progression
FPage Weight BudgetAction3.2 MB transferred, 71 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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction6558ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.trenitalia.com/it.html | 2282ms | 68ms | 9ms | 3rd |
| Unattributable | 1451ms | 454ms | 0ms | 3rd |
| https://www.trenitalia.com/etc.clientlibs/trenitalia/clientlibs/clientlib-site.lc-69b36a9599d33ce92a87c3410573f7f5-lc.min.js | 1147ms | 734ms | 148ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202603.1.0/otBannerSdk.js | 520ms | 348ms | 84ms | 3rd |
| https://assets.adobedtm.com/f7c60cc22ee3/67305c01944a/launch-EN2aef38628cf5447e9c07c7801d13be4b.min.js | 236ms | 180ms | 47ms | 3rd |
| https://cdn.raffle.ai/search/index.js | 208ms | 148ms | 58ms | 3rd |
| https://cdn.cookielaw.org/consent/40754f7e-8d13-4b19-815c-f67996bfd76f/OtAutoBlock.js | 206ms | 180ms | 3ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/otSDKStub.js | 125ms | 105ms | 4ms | 3rd |
| https://assets.adobedtm.com/extensions/EPc7341b33570d4c988798fc9f0093d4b2/AppMeasurement.min.js | 123ms | 90ms | 6ms | 3rd |
| https://www.trenitalia.com/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.js | 109ms | 63ms | 17ms | 3rd |
Showing top 10 of 12 scripts
FJS BundlesAction22 scripts, 327 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.trenitalia.com/etc.clientlibs/trenitalia/clientlibs/clientlib-site.lc-69b36a9599d33ce92a87c3410573f7f5-lc.min.js | 205 KB | 148 KB (72%) | ✗ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202603.1.0/otBannerSdk.js | 130 KB | 62 KB (48%) | ✓ | 3rd |
| https://cdn.raffle.ai/search/index.js | 112 KB | 53 KB (48%) | ✓ | 3rd |
| https://assets.adobedtm.com/f7c60cc22ee3/67305c01944a/launch-EN2aef38628cf5447e9c07c7801d13be4b.min.js | 82 KB | 41 KB (50%) | ✓ | 3rd |
| https://www.trenitalia.com/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.js | 35 KB | 23 KB (66%) | ✓ | 3rd |
| https://www.trenitalia.com/etc.clientlibs/cq/personalization/clientlib/personalization/integrations/commons.lc-5370019fd157d93202ac2d6f771f04b8-lc.min.js | 1 KB | — | ✓ | 3rd |
| https://www.trenitalia.com/etc.clientlibs/core/wcm/components/commons/datalayer/acdl/core.wcm.components.commons.datalayer.acdl.lc-bf921af342fd2c40139671dbf0920a1f-lc.min.js | 11 KB | — | ✓ | 3rd |
| https://assets.adobedtm.com/extensions/EPc7341b33570d4c988798fc9f0093d4b2/AppMeasurement.min.js | 13 KB | — | ✓ | 3rd |
| https://assets.adobedtm.com/extensions/EPc7341b33570d4c988798fc9f0093d4b2/AppMeasurement_Module_ActivityMap.min.js | 2 KB | — | ✓ | 3rd |
| https://www.trenitalia.com/etc.clientlibs/trenitalia/clientlibs/clientlib-launch.lc-34b7286186b08b9b3b6d4b59b08d465a-lc.min.js | 1 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
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
DPage Weight InventoryAction71 resources · 3.2 MB · 327 KB savings availableFIX
~327.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 71 resources | 3.2 MiB | ||||||
CImage OptimizationAction25 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
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
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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingmax-age=0REVIEW
max-age=0
| Directive | Value | Meaning |
|---|---|---|
| max-age | 0 | Cache for 0 seconds |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading5 fonts (296 KB)PASS
Web fonts
5
296 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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 ~89 KB and ~178 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall71 requests over 1384msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.trenitalia.com www.trenitalia.com | Other | 2282ms | 48 KB | — | €12/mo | Costly |
Unattributable Unattributable | Other | 1451ms | 0 KB | — | €8/mo | Costly |
www.trenitalia.com www.trenitalia.com | Other | 1147ms | 205 KB | 72% | €6/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 520ms | 130 KB | 48% | €3/mo | Essential |
assets.adobedtm.com assets.adobedtm.com | Other | 236ms | 82 KB | 50% | €1/mo | Costly |
cdn.raffle.ai cdn.raffle.ai | Other | 208ms | 112 KB | 48% | €1/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 206ms | 4 KB | — | €1/mo | Essential |
OneTrust cdn.cookielaw.org | Consent | 125ms | 9 KB | — | €1/mo | Essential |
assets.adobedtm.com assets.adobedtm.com | Other | 123ms | 13 KB | — | €1/mo | Optional |
www.trenitalia.com www.trenitalia.com | Other | 109ms | 35 KB | 66% | €1/mo | Optional |
www.trenitalia.com www.trenitalia.com | Other | 83ms | 89 KB | — | €0/mo | Optional |
rum.hlx.page rum.hlx.page | Other | 68ms | 1 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- www.trenitalia.com adds 2282ms and costs ~€12/month
- Unattributable adds 1451ms and costs ~€8/month
- www.trenitalia.com adds 1147ms and costs ~€6/month
- assets.adobedtm.com adds 236ms and costs ~€1/month
- cdn.raffle.ai adds 208ms and costs ~€1/month
100% 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.trenitalia.com takes 2282ms 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
Unattributable takes 1451ms 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.trenitalia.com takes 1147ms 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
72% of www.trenitalia.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
assets.adobedtm.com takes 236ms 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
50% of assets.adobedtm.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
cdn.raffle.ai takes 208ms 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
66% of www.trenitalia.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