Performance
· 24 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.
1.43 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.31 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
208 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.003
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.57 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.
6.30 s
Page Load Progression
FPage Weight BudgetAction8.1 MB transferred, 194 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
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 ImpactAction67% third-party, 0 ms blockingFIX
DJS Execution CostAction2165ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.treccani.it/_next/static/chunks/framework-663aa04c6d4d8976.js | 605ms | 446ms | 4ms | 1st |
| https://www.treccani.it/ | 424ms | 3ms | 0ms | 1st |
| Unattributable | 266ms | 16ms | 0ms | 1st |
| https://www.gstatic.com/recaptcha/releases/0lEGiwO4Qwx5R9ArxUy0mBpf/recaptcha__en.js | 201ms | 180ms | 16ms | 3rd |
| https://www.treccani.it/_next/static/chunks/pages/_app-2f31a7dfae9bf15d.js | 158ms | 99ms | 21ms | 1st |
| https://s.adplay.it/treccani/adplay.js | 146ms | 82ms | 34ms | 3rd |
| https://clickiocmp.com/t/consent_235255.js | 142ms | 96ms | 6ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HWHNGNTMSL&cx=c>m=4e6b91 | 95ms | 83ms | 11ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MNG6HS2 | 74ms | 65ms | 8ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202611060101/pubads_impl.js?cb=122882156 | 53ms | 40ms | 12ms | 3rd |
FJS BundlesAction55 scripts, 1.3 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://s.adplay.it/treccani/adplay.js | 369 KB | 293 KB (80%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/0lEGiwO4Qwx5R9ArxUy0mBpf/recaptcha__en.js | 352 KB | 186 KB (53%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/0lEGiwO4Qwx5R9ArxUy0mBpf/recaptcha__en.js | 0 KB | 186 KB (53%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/0lEGiwO4Qwx5R9ArxUy0mBpf/recaptcha__en.js | 352 KB | 186 KB (53%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202611060101/pubads_impl.js?cb=122882156 | 216 KB | 161 KB (75%) | ✓ | 3rd |
| https://www.treccani.it/_next/static/chunks/pages/_app-2f31a7dfae9bf15d.js | 252 KB | 126 KB (50%) | ✓ | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-HWHNGNTMSL&cx=c>m=4e6b91 | 183 KB | 69 KB (38%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MNG6HS2 | 143 KB | 63 KB (44%) | ✓ | 3rd |
| https://clickiocmp.com/t/consent_235255.js | 76 KB | 27 KB (36%) | ✓ | 3rd |
| https://www.treccani.it/_next/static/chunks/860.71d3ed7598b38a41.js | 3 KB | — | ✓ | 1st |
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 InventoryAction194 resources · 8.1 MB · 1.3 MB savings availableFIX
~1.3 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 194 resources | 8.1 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-store
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
BImage Optimization92 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BDocument CompressionDocument response uses gzip; brotli would be ~20% smallerREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading9 fonts (1154 KB)PASS
Web fonts
9
1154 KB total
Render-blocking
0
of 9
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
- 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
- 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
- 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
- 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
- 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
- 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
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~896 KB and ~1792 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
AAsset Compression1 of 1 asset host still on gzipPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Network Waterfall194 requests over 2280msINFO
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 | 201ms | 0 KB | 53% | €2/mo | Costly |
s.adplay.it s.adplay.it | Other | 146ms | 369 KB | 80% | €2/mo | Optional |
clickiocmp.com clickiocmp.com | Other | 142ms | 76 KB | 36% | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 95ms | 183 KB | 38% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 74ms | 143 KB | 44% | €1/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 53ms | 216 KB | 75% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.gstatic.com adds 201ms and costs ~€2/month
www.gstatic.com takes 201ms 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
53% of www.gstatic.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
80% of s.adplay.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
75% of securepubads.g.doubleclick.net'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
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-10-13 — 2026-11-09)
LCP (p75)
2252 ms
78% good
INP (p75)
346 ms
60% good
CLS (p75)
0.020
96% good
FCP (p75)
1726 ms
TTFB (p75)
558 ms
Image Optimization71 images, 10 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
71
Total Size
10 KB
Oversized
2