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.
681 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.05 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.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.43 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.
3.05 s
Page Load Progression
FPage Weight BudgetAction3.7 MB transferred, 70 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
DJS BundlesAction44 scripts, 434 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn-eu.dynamicyield.com/api/9878387/api_static.js | 105 KB | 67 KB (65%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-59X4WML&l=dataLayerFCA | 131 KB | 65 KB (50%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-K3PWCJ3X&l=dataLayerFCA | 138 KB | 62 KB (45%) | ✓ | 3rd |
| https://www.lancia.com/etc.clientlibs/stellantis-d2-core/clientlibs/stellantis-framework/core/vendor.js | 54 KB | 48 KB (88%) | ✓ | 1st |
| https://www.lancia.com/etc.clientlibs/stellantis-whitelabel/clientlibs/WlModalWindow/resources/js/505.b864107b111efa9f060b.js | 95 KB | 43 KB (49%) | ✓ | 1st |
| https://www.lancia.com/etc.clientlibs/stellantis-whitelabel/clientlibs/WlUnifiedHeader/resources/js/505.d9a7ab63a48ad90c7b86.js | 95 KB | 43 KB (49%) | ✓ | 1st |
| https://www.lancia.com/etc.clientlibs/stellantis-d2-core/clientlibs/stellantis-reuse-fw/core/vendors/vendor.js | 70 KB | 40 KB (60%) | ✓ | 1st |
| https://www.lancia.com/etc.clientlibs/stellantis-d2-core/clientlibs/stellantis-reuse-fw/core/vendors/gsap.js | 50 KB | 23 KB (46%) | ✓ | 1st |
| https://assets.adobedtm.com/launch-EN0f42a4515733422993e3459e15089f00.min.js | 70 KB | 22 KB (31%) | ✓ | 3rd |
| https://code.jquery.com/jquery-3.6.0.min.js | 31 KB | 21 KB (68%) | ✓ | 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 InventoryAction70 resources · 3.7 MB · 434 KB savings availableFIX
~434.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 70 resources | 3.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BJS Execution Cost723ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.lancia.com/ | 167ms | 5ms | 3ms | 1st |
| https://www.lancia.com/etc.clientlibs/stellantis-d2-core/clientlibs/stellantis-reuse-fw/core/vendors/gsap.js | 149ms | 69ms | 6ms | 1st |
| Unattributable | 107ms | 2ms | 0ms | 1st |
| https://www.googletagmanager.com/gtm.js?id=GTM-59X4WML&l=dataLayerFCA | 85ms | 74ms | 10ms | 3rd |
| https://www.lancia.com/etc.clientlibs/stellantis-whitelabel/clientlibs/WlButton/resources/js/788.c6a1a131cbd3d75504e2.js | 83ms | 71ms | 3ms | 1st |
| https://www.googletagmanager.com/gtm.js?id=GTM-K3PWCJ3X&l=dataLayerFCA | 71ms | 58ms | 13ms | 3rd |
| https://assets.adobedtm.com/launch-EN0f42a4515733422993e3459e15089f00.min.js | 61ms | 48ms | 11ms | 3rd |
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Third-Party Impact19% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
AImage Optimization2 images, 0 KB saveablePASS
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
A+Font Loading7 fonts (601 KB)PASS
Web fonts
7
601 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 ~284 KB and ~568 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
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
Network Waterfall70 requests over 1863msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 85ms | 131 KB | 50% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 71ms | 138 KB | 45% | €1/mo | Optional |
assets.adobedtm.com assets.adobedtm.com | Other | 61ms | 70 KB | 31% | €1/mo | Optional |
Image Optimization28 images, 2065 KB total, 18 KB wastedINFO
Image Optimization Audit
Total Images
28
Total Size
2065 KB
Oversized
1
Wasted
18 KB